Ask HN: Making a mobile app as a back-end developer?

[dogukanzengin]

My main area of expertise has been backend java development for years. I have a few mobile app ideas I have been designing the backend for a while. But since I have no frontend experience, I don't know how to proceed. Should I start learning, which will take large amount of time since there are plenty of platforms you need to publish, or should I outsource it somehow ? If outsourcing is the right answer, where to find people I can work with ? Please forgive my English.

[srameshc]

Start learning. It has never been this easy to learn and build an App. I would certainly recommend Flutter/Dart rather than any JS framework. Since you mentioned Java, I personally think you will find working with Dart comfortable. Flutter is cross platform and now you can also build Web apps, though it is in beta. Flutter makes it easy for developers to play with the design aspect of application development so it will be a great way to get insight and learn a few things. It will be always challenging to outsource if you are not sure about the capabilities or reliability of developer or team you want to work with.

[pcr910303]

As always: quoting my comment[0] about flutter:

> We really should be trying to use the native GUI toolkit (or cross-platform native UI libraries like libui), not using Flutter-esque libraries that draws everything from scratch. Coherent UI is a very important point to users IMO. Users can assume that some special feature from App X will also work on App Y. For example, in macOS Cocoa, textboxes have universal readline-esque keybindings (and is configurable globally) which, as an Emacs user, very, very useful. Most Mac apps use Cocoa as the GUI toolkit, so basically all kinds of apps can benefit these keybindings. Another example of this directly benefiting users is the addition of tabs in macOS Sierra. macOS Sierra added tabs to Cocoa apps, and applications could get the feature without additional modification. I can use tabs in any application, with the same look-and-feel, in all apps. Stories like these are mostly only macOS; since Windows apps usually just re-invent all kinds of UI elements, while Linux's GUI toolkits are super-fragmented. (GTK vs Qt is one thing, and there are lots of other options!) Adding Flutter or any other UI library that draws everything from scratch is a bad idea.

[0] https://news.ycombinator.com/item?id=20612195

[BoorishBears]

If you want to make a product, use what ever tool is most productive for you.

Unless you're writing an IDE, you're not going to lose users (you care about) over not supporting Emacs bindings.

People will put up with a lot of garbage if your product fills a need. And non-native UI is not even inherently garbage, just sub-optimal (and even that depends on the product)

[saagarjha]

> If you want to make a product, use what ever tool is most productive for you.

If you’re making a product that other people use, I would caution you against putting their needs on the back burner. It’s very often the case that what’s easier for the developer ends up making a worse product for the people that have to use it.

> Unless you're writing an IDE, you're not going to lose users (you care about) over not supporting Emacs bindings.

No, the whole point of this feature is that it works outside of an IDE. I don’t even use Emacs and these shortcuts are so ingrained in me that I ended up setting up custom shortcuts to emulate this in the places that wouldn’t support it (where possible, of course…).

[BoorishBears]

I don't see how a comment calling out the fact the most important thing your product should do is "fill a need" is claiming you should put their needs on the back burner.

Unless you mean some of their needs.

In which case yes, that's my point. If you want a successful product, prioritizing features is very important, and in most contexts, filling your "core need" is going to add a lot more value than a native UI does.

>I don’t even use Emacs and these shortcuts are so ingrained in me that I ended up setting up custom shortcuts to emulate this in the places that wouldn’t support it (where possible, of course…).

Unless your tool is for a space where a lot of users are going to say stuff like this is a major detractor for your new product (...like an IDE or other developer tool) you're much better off just making your product and validating it.

-

When you're making a new product, and bootstrapping it like OP describes, your currency is time.

Time isn't just money, it's a changing market, it's your own motivation coming and going, your overall situation can change and make working on it untenable.

The less time you spend fighting a lack of knowledge the better.

A working MVP in Xamarin.Forms in a few weeks > months spent killing the moment for your idea and learning enough iOS and Android to have the base knowledge for a middle of the road native app, is true much more often than people like to admit.

[pcr910303]

Well, just Emacs bindings are not the point; it’s that non-native widgets don’t respect the user’s intent of customizing the whole OS. Let’s take another example: macOS supports Dark Mode from Mojave... and Electron apps usually don’t implement them, or if they do: with a separate toggle.

Yeah, these aren’t great deals, but people who care enough try to switch to alternatives. And by using native UIs, you can mitigate your concerns about whether you implemented everything the user expects or not.

[listenallyall]

The most popular apps in the world -- Facebook, Instagram, Twitter, Uber, Line, Airbnb, Snapchat, many many more -- all use completely custom UIs focused on consistentcy across platforms, which they accomplish by purposely not following any individual platform's specs or using platform widgets.

[pcr910303]

Yeah, and they are successful (mostly due to networking effects — all of the apps you’re mentioning have strong network effects) in spite of their app quality.

The Facebook app is criticized everywhere, I can’t think of anyone who likes their app.

AFAIK AirBnB once used RN but moved to native development, and Twitter use native widgets.

Also, don’t forget that they have the resources to develop all of the expected features of native widgets, for example Accessibility. The OP probably doesn’t.

And, this is all talking about RN which is actually half native since they use native widgets; Flutter is much worse than this because they draw their own widgets.

[jurip]

They also have dozens of developers working on their apps.

[on_and_off]

A mobile example : I know a company that decided to scrape their crossplatform codebase (I can't remember if it was flutter, RN, or whatever else).

They had the opportunity to be promoted as app of the day by Apple, which would have been awesome for them.

Unfortunately the condition was to ship an apple watch integration. The sdk they were using did not support it.

[on_and_off]

You just have to know that all cross platform toolkits come with lots of drawbacks.

Maybe you can live with them, maybe not, it depends a lot on the usecase.

[rohansingh]

As someone in a similar position as the OP, I definitely recommend Flutter. I'm working on a new hardware startup, and my team has strong backed and infra experience.

That jives well with our product, but we do also need a mobile app to interface with the product. Flutter has been great in this regard. Dart and the declarative UX framework are very grokkable for backend folks.

The UI/UX is definitely good enough. Our app feels native, is snappy enough to get the job done, and looks way better than the native Android app we were trying to build before. Even if we were to have to go fully native down the road, Flutter is just the right tool for the job of getting us off the ground.

For a small team, there's just no way we could build both an iOS and Android app separately, on top of hardware, firmware, and a backend. It would kill us before we ever even launched.

[saagarjha]

> The UI/UX is definitely good enough. Our app feels native, is snappy enough to get the job done

n.b. to you.

[latchkey]

Sure, but they are correct and you're focused on the premature optimization.

I've also built a small flutter app where everything runs snappy and it more than solved the needs with a minimal development time and number of lines of code.

[saagarjha]

If you’re happy and your users are happy with Flutter, go right ahead with it. But please don’t be the all-too-common startup that writes blog posts about their “coding velocity” with Flutter (of course, they can’t afford to hire talent for anything else) while they keep their fingers in their ears as users scream about usability or missing platform functionality.

[latchkey]

My users have no idea it is flutter, that is the best part.

[fauigerzigerk]

I agree with starting to learn. But whether or not Flutter is the right choice may depend the app.

Flutter allegedly consumes about twice as much memory as a native app. So I guess it matters who the target audience is and what kind of device specification can be expected.

Disclaimer: I have never written a Flutter app and I'm not sure if the information I have found is still up-to-date.

[la_fayette]

Can you give any sources for twice as much memory argument of flutter compared to native? What do you mean with memory exactly, is resulting binary twice as big or does the flutter app neads twice as much main memory?

[fauigerzigerk]

I was looking for some benchmarks two weeks ago because I find Flutter interesting, and I found two benchmarks showing twice as much RAM usage at runtime (not the app binary) for some simple demo app. I no longer have the link, but I can try to find it.

Edit: What I have also found is that there are plans (or ongoing work) to port Flutter to Apple's Metal framework, which should cut memory usage by a lot on iOS.

Edit 2: Here's one of the benchmarks: https://thoughtbot.com/blog/examining-performance-difference...

[la_fayette]

Hey cool thank you! This is an interessting question how different cross platform approaches compare in terms of performance.

[listenallyall]

>> Flutter allegedly consumes about twice as much memory as a native app.

Would be interesting to benchmark Flutter's memory use vs. the app that was never built because of the lack of time, steep learning curve, boredom, etc, to deliver both iOS and Android natively.

[apl002]

I have never explored Flutter.

Coming from a web background, React Native made the most sense for me. Since I started using it a year ago, I absolutely love it. Great community with constant updates from Facebook, tons of articles/blogs/courses on how to learn it and there hasn't been a single feature Ive wanted to build but couldn't due to some lib restriction

[latchkey]

I'm a backend/web dev and recently built an app with flutter over RN. The reason I picked flutter was more about the component/widgets... flutter has them built in. This allows me to just focus on building features over trying to figure out which things to use with RN.

[apl002]

What kind of components/widgets are you referring to? RN has a lot built in and then there are a good number maintained by the community. As far as custom UI components I know some people use libs like NativeBase but I handroll my own

[bg117]

Flutter is declarative. UI is rendered each time completely. Will it not consume more power? In an increasingly warming world, is it a wise choice to use Flutter?

[swiley]

Dart feels like one of those google things kind of like chromium where the first step in setting up for building it requires (more or less) becoming a google employee.

[latchkey]

I personally downvoted you because this comment just is not helpful.

You don't need to ever 'build' Dart unless you're going to be working on the language itself... and if you are, you might as well be a google employee and get paid for it.

Setup for Flutter development is just a few easy steps.

[rubicon33]

I started my career as a backend developer as well, and I'd like to echo another comment in this thread:

Start learning. It has literally never been easier to build a mobile app.

Flutter is IMO the best option right now if you want to build a cross platform app. I've developed native iOS applications, native android applications, and even react-native applications that run on both ios/android. By far, hands down, Flutter is THE BEST of all the options if you need to target both platforms.

[m11a]

> By far, hands down, Flutter is THE BEST of all the options if you need to target both platforms.

Would you mind elaborating on why you feel this? Particularly why you personally felt it to be better than React Native?

[rubicon33]

1) Documentation - The Flutter team has done an amazing job supporting their ecosystem with great documentation and examples. I've learned how to write production-level apps with animations, networking, bluetooth, security, and native features like Core Data integration... in EVERY instance it was easier to find the documentation for how to do it with Flutter. They also have a great YouTube channel with daily updates of quick 'how to' videos that are actually quite useful.

2) Tooling. Everything about the installation, update, package import, debugging, UI inspecting, performance monitoring... EVERYTHING about the development lifecycle is better with Flutter and that's because of its TOOLING. Straight out of the box you get debugging and performance monitoring. It couldn't be simpler. You run your app in debug mode and it ASKS you if you want to display a performance monitoring tool. Awesome.

3) "Out of the box" widgets / components. Hands down, Flutter ships with more widgets (components) out of the box. Often when looking for a component in flutter, it was supported "out of the box", whereas React Native required I npm install some 3rd party package, from some developer I'd never heard of, who probably isn't maintaining the project anymore.

4) Performance. I'm a strong advocate for writing your app in native code. I believe you will never get the same performance in a hybrid app, especially if you have complex animations, or huge lists.

With that said... Flutter has completely blown me away. For the first time, I actually can't tell if an app is hybrid if it's a flutter app. The responsiveness is on par with native. The UI / Animations are on par with native. The same simply cannot be said for React Native.

[_fqqr]

I can't say for myself, but Nubank (one of the largest digital banks) wrote an extensive report on why they chose Flutter.

https://cdn.nubank.com.br/mobile/taskforce/nubank-mobile-arc...

[petagonoral]

That's a good read. It's a pity the sample code repos aren't public.

[billfruit]

I thought Xamarin was a very viable option too, esp considering that it supports F# as well.

[ufmace]

Just go ahead and start building. You didn't mention a mobile OS, but if you know Java well, it should be straightforward to pick up Android development, which is already in Java. IMO, don't bother with any other languages, unless you really want to build the iOS version first. Just throw something together for the UI to get started and get the core functionality working. Then, if it feels too ugly, try working on that some.

You could maybe hire a contractor or something to help make the UI better if needed. Personally, I wouldn't bother unless your app is published and bringing in money, and you can make a business case that spending $X on making it better will bring $Y more revenue. That would give you an idea of what's a good amount to spend. I wouldn't worry about any of that yet though.

[coin]

Java to Swift is also very straightforward. Most of the learning is with OS’ API. It’s nothing a competent software person can’t handle.

[cliqueiq]

And also nothing a competent software person should waste their time on.

[chrismmay]

I took the same journey you are undertaking. It's quite doable. You'll need a macbook to make a native iphone app. You'll need to sign up for Apple Developer which costs $100 a year. You could go the web route, but you then you won't really be learning native development for iOS and Android. Java for Android and Swift for iOS are the way to go in my opinion. If you can afford (or already have) a MacBook, like others have said, there is no reason not to dive right in and start working. When I started I licensed AppCode from JetBrains because I was used to IntelliJ. Eventually though I switched to XCode like everyone else. One thing though, make sure your Mac has at least 256GB of RAM not just 128GB because XCode and all the updates will fill that up very quickly.

[rvz]

> One thing though, make sure your Mac has at least 256GB of RAM not just 128GB because XCode and all the updates will fill that up very quickly.

I'm sure you meant disk space instead of RAM perhaps? I think it would be overkill to obtain a Mac with 256 GB or 1 TB of RAM just to create iOS Apps. ;)

[chrismmay]

Yup, sorry, my mistake.

[eugeniub]

> Java for Android

Even though OP said they are a Java developer, I would strongly urge going with Kotlin for Android at this point. Kotlin replaced Java as the default language for native Android development in 2017, and new code samples are being written in Kotlin. At the very least, start with Java, and ease your way into Kotlin, since it's 100% interoperable with Java. Aside from being the default Android langauge, Kotlin has many other benefits.

[listenallyall]

Also, Kotlin on the server is better than ever and would likely boost OP's productivity as well.

[james-skemp]

On the other hand, you (OP) should develop an app that's best for you. So if you're using an Android device, I might recommend skipping iPhone development.

Benefit is that you can develop on Windows, Mac, or Linux, won't have to buy an iDevice or two, or a new machine.

[bcrosby95]

Note that mac minis are viable options if you don't want to shell out the $$$ for a macbook.

[keyle]

I second this, the latest mac minis are little beasts.

[cerberusss]

And their resale value is truly magnificent.

[RussianCow]

> One thing though, make sure your Mac has at least 256GB of RAM not just 128GB because XCode and all the updates will fill that up very quickly.

Surely you mean disk space, not RAM?

[mosselman]

Of course he does.

[saagarjha]

> You'll need to sign up for Apple Developer which costs $100 a year.

Only once you’d like to publish your app on the App Store.

[OGWhales]

> You'll need a macbook to make a native iphone app

I did not realize this. Sad :(

[me551ah]

Creating an app is quite easy. There are many cross platform solutions available like Flutter, React Native and Xamarin and you should be up and running quickly. I personally prefer Xamarin since I am more comfortable with C# and really like its layout engine.

Though I know quite a few backend developers who have built apps and struggled with the following issues.

1. UI/UX - UX and UI are critical for an app and you might have to hire a designer to create those interactions for you. Backend roles usually involve no/little UI/UX work and it's easy to only focus on the functional bit of it.

2. Updates - It's easy to rollback a backend codebase from production or revert it to it's last state when something goes wrong. When deploying an app you have no such option. Android updates take about a week to reach 80% adoption. And if you encounter a critical bug in that time period, you have to halt the rollback. You end up with some users on a new buggy version and some users on an older version. This can be tricky to manage.

[cerberusss]

You either learn it yourself, or pay someone else. If you have more time than money, then you learn it yourself. And vice versa, of course. It's really quite simple.

If you want to learn and start with iOS, I'd advise doing the 100 Days of SwiftUI: https://www.hackingwithswift.com/100/swiftui

The great thing about this course is that you can do it alongside your work, because it's divided in chunks of 1 hour. My experience is that you can do it in the evening, even after a full day of work.

[cableshaft]

I've been diving into SwiftUI recently and it's pretty satisfying (although I used to do iOS development full-time back when it was all Objective-C, I've been mostly in C#/.NET/Angular land for the past 6 years).

The framework is well designed and makes setting up the UI for native apps pretty easy with a lot less coding than I'm used to for other frameworks. I'd recommend looking into it if you don't care about cross platform (and I wouldn't personally care about that right away if you're getting your feet wet with mobile).

Swift is also a fun language to program in once you get the hang of it (and yet it's not too different from other languages, so it shouldn't be too hard to pick up coming from Java).

Although with previous Java experience Android might be easier for you to get into.

[highhedgehog]

Anyone knows if there is there something like that for android or for any other cross-platform tools (Xamarin, Flutter, etc)?

[karmakaze]

I'm also a backend dev and have made some web frontend let projects. For mobile, I find Flutter/Dart the easiest to work with. Feels somewhere in-between TypeScript/js and Java. What's much more of a challenge is how to make it look great and easy to use.

[metalgearsolid]

As a native iOS developer I will gladly help you answer some of these questions if you want to provide more specifics on what you're looking to do. Could you reply with your email, or put it in your HN profile? Or just elaborate here?

On mobile we work with pretty high-level abstractions, so if you did this yourself, most of the new stuff to you would be the frameworks like UIKit or Core Data (at least on iOS).

Edit: Ray Wenderlich and objc.io are my go-to learning resources for iOS stuff

[m11a]

People suggest Ray Wenderlich often, and he seems great, but it's mostly videos which I personally cannot learn from.

He has books, but they cost a fair bit (around $100/book iirc), and they're not included in the subscription I think, unless I'm missing something.

[AbstractFactor]

If you know Java, Android can be programmed in Java or Kotlin (a Java like JVM language).

A lot of Android is not front end. SQLite databases, models, maybe use cases, JUnit unit tests etc. You know how to do a DAO to MySQL, Oracle or Sqlite? You know how to do a JUnit unit test of a data structure? That part will be easier then.

Keep UI simple - one Activity, Navigation and Fragments. Use a ConstraintLayout and simple views like TextViews. Use a popular, simple image library.

Much of Android work is not UI work. Keep the UI simple initially.

[dehrmann]

Most of the Android-specific stuff is around app lifecycle and yes, UI. And you're right that a lot of this isn't so different from backend Java.

I'd suggest OP download Android Studio. It's based on IltelliJ, so there's a good chance OP will feel right at home.

[erokar]

Check out Flutter/Dart. Lets you target both Android and iOS with one codebase.

[geoah]

Plus one for flutter. There are a couple of ways to make windows/linux/macos apps as well.

The way to design widgets is pretty horrible but you get used to it.

[rohan1024]

I think it's also easier for any developer who is looking to start front end development.

[coder1977]

If you want to test your ideas, better outsource the front end dev (upwork.com would be an easy place to find talent that suits your budget) and have your ideas built asap to see if they get any traction, if not you can kill them quickly and move on to your next set of ideas.

If the goal is to build a project as a hobby and (maybe) make money from it, best to learn any of the cross platform tools for mobile apps, here are some popular ones: https://hackernoon.com/9-popular-cross-platform-tools-for-ap...

Best of luck!

[mooreds]

I worked on an app as a backend developer with an intermediate understanding of JavaScript/html. I was able to use Cordova to build out a functional prototype. After that we were able to engage with a contracting firm and point to the prototype as the requirements. This let them quote a firm fixed price, which we of course enjoyed. Sorry, not sure how the contractor was found.

Depending on the functionality needed for your app idea (and your skills), this might be a good path.

This was in the early 2010s.

[dogukanzengin]

Thanks for pointing out Cordova. Just took a quick look at it, this can be a very good starting point, appreciate.

[la_fayette]

There is a competitive framework, named capacitor, which is developed by the ionic team. Together with ionic, capacitor is very easy to get things done fast...

[jayd16]

There's also the option of building a mobile web page if that's easier for you. It's cross platform and no publishing headaches. Of course if you need background execution or platform support it can be easier to just go the app route.

[maxencecornet]

I work as a back-end developer, I've built several apps using react native & expo and the experience was pretty good, I'm really happy with the results

[sharma_pradeep]

I have done all of them and from your comments it seems you start to like Cordova, means you are interested in cross platform release. Anyway, I recommend to read this first

My Background: Coming from Java backend experience, I built multiple android apps(native Android), tried react native and then learned Flutter. I also outsourced two apps and successfully got it done in react native.

My Advice:

1. Do it yourself if you want to really learn mobile development. I recommend to explore Flutter(cross-platform and similar to Java), try to build a sample app in a day or two. Whether you succeed or not, ask yourself, how do you feel now, would you want to learn and code yourself? Remember, it is going to take a lot more time than you estimate now(when I learnt Android first, I estimated a week to learn and years after, I'm still learning, I shipped my first decent app after 4 months, while working on backend parallely)

2. If the answer is No to all above questions

Outsource the work. How?

A. Do you know any friend who'd want to do this?

B. Hire a developer on hourly basis to work with you closely and ofcourse remotely. Where? Invide or Toptal. Few tips for successful outsourcing

- Do not go for upwork or freelancer or project basis work

- Teamwork is key, hire someone who's a team player

- Have weekly call to discuss progress with the dev. Discuss things other than the project as well, build relationship. Transaction based approach does not work.

- Think how can you make it easy for the other person to understand. Can you get every minute screen detail designed via a designer and hand it over to the dev?

[girishso]

Would you still recommend Flutter over Cardova (with Elm app inside)? Flutter/Dart seems cool, but I'm in love with Elm these days. Looking to build a app by myself not outsourcing.

[dogukanzengin]

Thanks, great mind map !

[on_and_off]

I started as a backend c++ dev, I am now a mobile dev. The transition was actually pretty easy, especially since I had some familiarity with java (mostly from the uni).

You already know java, learning Android should be pretty easy, whether you leverage kotlin or not.

That would be the obvious option number 1 to develop your app.

Whether you want to :

- do it in java or kotlin for Android

- start with ios instead learning swift

- use a crossplatform sdk. Caution, there is a reason why these sdks are still only marginally used. It is not because mobile devs are grumpy but because they come with some advantages and drawbacks and very often these drawbacks are too important.

- find somebody to code it for you.

will depend on what kind of app you are doing, and what you want to do with it.

e.g. some kind of social app should probably be on all platforms because you want to maximize network effects.

Photography apps are a bit easier to develop on iOS. As with everything dealing with low level, having a smaller surface of change helps.

It depends also on your market.

[CyanLite2]

Xamarin. C# is close enough to Java that you won't need to re-learn anything. Perfect for back-end devs trying to do Mobile and very friendly development environment.

[nmfisher]

I'd actually suggest Flutter for the same reason. As a fresh entrant to mobile dev, I found Xamarin apps to be peculiarly unstable, often crashing for no apparent reason.

On the plus side, though, tooling for Xamarin is a lot nicer. VS is definitely a first-class citizen, and being able to launch on a remote iOS device/simulator from inside VS is a definite advantage.

[thrower123]

I'd second this suggestion. If you aren't already conversant in the complexities of modern JS, trying to do a web-dev-centric mobile app is going to have you beating your head against the wall and cursing a lot.

[hashamali]

React Native is a good place to start. Not only would you be able to put together mobile apps, but the knowledge would be applicable to building web pages as well.

[panpanna]

A lot of people here recommend Flutter, React and similar. But these build upon frontend technologies and use a frontend mindset you might find very difficult to get into.

If you know Java, I would instead recommend going through Googles new Kotlin courses for a week or so and see where that leads you:

https://www.udacity.com/course/kotlin-bootcamp-for-programme...

https://codelabs.developers.google.com/advanced-android-kotl...

https://codelabs.developers.google.com/codelabs/kotlin-andro...

Worst case, you have learned som kotlin which may eventually help you in your day job since kotlin is getting big in backend too.

[toast0]

If you know Java already, you should feel pretty at home with the basics of Android development. UI is tricky, but you can just smash some stuff together in the UI builder to get started. When you have a bit of experience, you can more easily judge the relevance and accuracy of the massive amount of internet sources and your potential outsourcing partners.

[jonplackett]

It depends what you want to make and on what platform. I recently spent a year or so learning Swift and I absolutely love it as a language.

My general advice is to pick a project that seems achievable fairly quickly and do your learning while trying to make that real. It’s much more motivating than learning for learning’s sake and only then actually making something.

[strikelaserclaw]

I was in the same situation, got myself a macbook, learned ios development over a weekend and just learned as i went along with trying to develop the app. I think the important thing is just to get started on something instead of thinking too big.

[ivan_gammel]

For cross-platform development you can learn ionic. TypeScript/Angular resembles Java and Spring a bit, UI is based on HTML and CSS, which you probably already know. I think it’s the easiest entry to both Android and iOS at once for Java developers and it works surprisingly well (we just released nice medical app on this platform). My main advice will be here not technical one: invest your time in UX, build wireframe (or even paper) prototype of your app and test on 3-5 real users. Then test final design. There will be useful insights for sure, which may save you a lot of effort and you’ll get less one star ratings after launch.

[randomor]

I'm one of those backend developers who created this app that was showcased here last week (ZenJournal): https://news.ycombinator.com/item?id=21876939 I started my career as a mobile dev so getting back to mobile from web was not very scary to me although I've forgot most of what I've learned 7 years ago. Luckily React Native is an very easy entry point, because I still sometimes help with frontend tasks at my work with React, so that's what I used.

[julius_set]

As an engineer who’s done most of it:

• Native iOS / Android for years • Backend development • Frontend web development • Machine learning models

I would suggest you one thing:

Do your research on finding really good succinct tutorials. The best approach is asking the right question on google.

You usually find tons of blogs / tutorials with very basic or simple examples. Your task — if you want to learn it — is to _research_ and find the best tutorial that covers the most ground in the shortest amount of time. This is not easy to do, but that’s a good skill quick learners have.

[soulchild37]

If you know Java already, learning Android shouldn't be too difficult, mostly just need to learn the lifecycle of activity (the view / UI) and some Android SDK stuff

[on_and_off]

the hardest part is to learn "modern android" and not to be bogged down by all the old ways to do things that you can find on the web.

e.g. lifecycles, we now have good tools to wrap them and don't really have to care about them.

The official doc is a good starting point.

[giancarlostoro]

Don't be afraid to target the web for your front-end. Progressive Web Apps can be put on app stores and installed on phones without an app store technically. I too have been mostly a back-end guy, but since I am a younger developer I got pulled into front-end work in the middle of my back-end marathon and have done both since, I don't usually do Full Stack though, I try to focus on one at a time where possible.

[BrandoElFollito]

I am an amateur dev, developing for fun and to annoy my family with home automation.

I needed to build front-ends and went the JS way. Vue.js and a framework (bootstrap vue for instance) and you are good to go.

With PWA you can make such an app very similar to a native one.

In terms of effort, for an amateur Python dev like myself, it took maybe a weekend to understand how this works, and then more time to get the details.

[brudgers]

Just start the thing you want to make. Figure things out as you go. You'll make mistakes. So what?

[melling]

I have around 30 small Swift iOS examples on Github.

https://github.com/melling/ios_topics

I’d pick one platform and build a great app for it. If you go Android, Kotlin looks like the way to go.

[PretzelFisch]

I am just kind of looking to make the same journey but from c++/C#. What is the recommendation for a good macbook? should I be looking at a macbook pro? In regards to Android what table or phone should I invest in as a testing platform?

[lazyjones]

Perhaps this if it still works https://news.ycombinator.com/item?id=12879179

Personally, I'd go with Flutter, but it's still a lot to learn...

[pryelluw]

Depends on the apps you want to build. What would be the first app youd create?

[zazzlez]

I would say, jfdi. You can provably build a decent mvp in a few weeks from scratch with no prior knowledge in a tool of your choice. I would personally chose react native + typescript + mobx.

[cobbzilla]

Has anyone tried Vue-Native? [1] Curious if this is a viable option for a web-based app.

[1] https://vue-native.io/

[Razengan]

Have a look at SwiftUI:

https://developer.apple.com/tutorials/swiftui/

[cerberusss]

I second this. I'm in the final stage of developing an app for a client, and it's using SwiftUI. The speed with which you can develop the interface is astonishing. Within Xcode itself, you can preview how it looks (i.e. compiles automatically and shows the result), and there's even a simulator integrated into the UI. Next to the preview is a play button so you can click a button, see an animation, et cetera.

You'll bump into a couple of things which require workarounds. For instance, you can only stylize the navigationbar if it's in normal mode, not if it's in the nice large title mode, and you'll have to use the UIAppearance API for that.

I'm also seeing lots of people calling things "bugs" but they actually just misunderstood the new layout system. I haven't seen showstopper bugs. Frustration is, however, unavoidable because it's a learning process.

[bsaul]

As an ios developer, i wouldn’t recommend someone to go into swiftUI, but rather directly go straight to cross platform techs. SwiftUI is still a niche, even amongst iOS devs.. the documentation is still lacking and the knowledge won’t be useful to anything else ( not to mention the fact that it’s transforming swift into a frankenstein language)

React native or flutter seems more long term ( although i must say i find them also problematic in some regards ).

Knowing the OP works with java, i would also recommend another option going with kotlin and do android only, as it i by far the largest market, and you will have a far lesser risk to get banned from the store for dubious reasons.

Edit : reading other comments i realize the cordova / ionic option also makes perfect sense on today’s hardware. Just make sure you understand the limitations and try a few apps made with that tech from the store first.

[Razengan]

> going with kotlin and do android only, as it i by far the largest market

From what I read here and there, that's a half-baked myth in a number of ways. Android users often lag behind the latest Android version, lacking access to the latest features. In terms of revenue as well, Android apps don't seem to be ahead of their iOS counterparts. Someone with experience in publishing for both ecosystems may be able to correct/corroborate this.

SwiftUI targets iOS, macOS, tvOS and watchOS, all counting for over a billion users combined. That's a substantial market, even when considering that it's limited to the latest version of each OS. And it's obvious that Apple's focus will be on SwiftUI going forward.

[bsaul]

you can’t combine ios/watchos/macos sales and reach 1.4b users. That’s probably the same people owning multiple apple devices.

But by that metric android is 2.5 billions.

now depending on your business, you may indeed want to target ios users as well, but gone are the days of « ios first, then maybe android later » (except maybe for tablets, where the ipad reigns alone).

As for swiftui, apple does indeed seems to be pushing forward with the tech, but at this point i don’t think it matters much anymore. Videogames are developped with cross platform tools ( because 3d) , form-based apps are developed with cross platforms tools (because ui performance is now good enough). All we’re left with are non-gaming interactive apps where you still need maximum responsiveness. And even in this case you’re often better just developping only that screen natively and leave the rest cross platform.

[ryanmccullagh]

You seem like a software engineer and mobile development is just an area of software engineering. Is time a concern? I believe you can learn a new technology stack.

[ketzo]

I haven’t seen it said here, but Swift and SwiftUI make it very easy to make stuff that looks good without knowing a thing about design.

[tomerbd]

Answer HN: http://flutter.io/

[jhales]

Take a look at expo. Rapid development with a minimum amount of domain specific setup knowledge.

[cliqueiq]

I was a back-end & full-stack guy for some time, doing things from ETL stuff to pipe-lining more colorful things interfacing with things from search, other analysis, etc... I started doing more "real" software development midway into college and was lucky (or maybe unlucky) enough to be able to develop my skills with a pretty full-stack spectrum (now doing things with Dart, React, to Python, Java, Docker, ES, Reddis, Helm, Jenkins, K8, AWS/GCP, etc, etc...).

I love Java (literally the best). Django is easy. Go is alright. jQuery & Bootstrap are great. Moving into heavy UI i.e, React/Redux, the entire JS ecosystem, mobile fragmentation, absurd, pointless policy changes in the UI world are absolutely 10x more annoying, difficult, arbitrary, meaningless, buggy, and horrible than anything back-end. TensorFlow, Unstructured-Data, NoSQL, CI/CD? No problem. You have an API, documentation that works, Linux systems that are consistent, predictable, repeatable. UI/UX? Changes every day. Docs from 2 years ago often don't work. Lower barrier to entry, lower quality ecosystem. Security & supply-chain nightmare. Fragmentation for no reason other than large corporations focusing on bottom lines and leaking core-rot. It's a insult to time investment.

I can build a full-stack, horizontally scalable, complex, awesome system with whatever tools you want I can guarantee you that no matter what you throw at me, I'll spend prob 75% screwing around with JS bugs, mobile garbage, awful ecosystems, and pointless garbage that at the end of the day comes down to nitpicking about pixel performance and arbitrary platforms.

I know I'm not the only who's wasted countless hours of my own time, clients money, companies time, and real-end-user money and value on things that were shiny and interesting to a PM or UX team and ended up sinking over half the cost of project on effectively nothing. The people that make the decisions don't understand it, because UI/UX is literally all they can "see". It's insanity. If I ever start a company, I'd love to model it off a concept like Stripe; such a beautiful concept of a beautiful idea run by some of the smartest guys out there, all based entirely off an API. No play-store policies, shifting trends, corporate politics, useless garbage, pure JS developers maintaining random repo's for tools that don't need to be built.

If you're smart, be like Amazon, Google, Facebook and every other huge idea: Make an unresponsive, useful front-end and just say no to fancy UI. Amazons website is an glorious defiance to the quite frankly disgusting culture of what robs real engineers time and resources away from something like curing disease, balancing equality, providing security, and focusing on things that could actually make the world a better place. Look at this site right here. Look what happened to Reddit.

If it's more than Bootstrap and you're not funded, just say no to UI/UX. JUST SAY NO.

EDIT: There's probably some good takeaways from the book "Zen and the Art of Motorcycle Maintenance". Do yourself and the world a favor by not feeding this economy of engineered over-complexity and willful-ignorance, especially in this day in age. Our species might be about to go extinct. There's more important things to do. Seriously.

[wolco]

You should download: quasar.dev

or

the ionic.io framework