[arghIdontwantto]

I've used Java very little. But about 1-2 years ago, on a long trip, and after learning about Kotlin on Android (iOS developer here) I decided to create a prototype of our iOS app on Android using Kotlin. Apart from some weirdness on the Android API (which Java, Kotlin, Groovy, etc) don't fix, I found myself very productive and created a fun prototype over a 14 hour flight that got me the OK to develop the first version of our Android app.

If you have developed in Swift (and probably other languages), Kotlin will feel very similar, the only thing you need to do is learn the native API's, but logic/model code is so similar you can just copy paste from swift->kotlin and vice versa and just fix 2-3 syntax issues