[Bewelge]

Cool project, but have mixed feelings about publishing ever easier ways to access this API. They've locked down the API a while ago for a reason.

Also there already exists this reverse engineered project: https://github.com/ByteSizedMarius/rewerse-engineering/

I do have a suggestion for your app though: Have it compare your basket of goods across different markets in your region to show you the cheapest option. I'm pretty sure this possibility is actually one of the reasons they locked down the API.

I've used Data from REWE in the past and made a comparison between a couple of cities in Germany (I believe it was Frankfurt, cologne, Berlin, Munich and Hamburg). Hamburg was by far the most expensive, often as much as 10-20% more expensive.

[wazHFsRy]

The existing project was a great inspiration and helped me figure out the mTLS stuff. I totally get your mixed feelings, though.

I really like your suggestion. I will put it in an issue and look into that. https://github.com/yannick-cw/korb/issues/4

[Bewelge]

Just to be clear, my mixed feelings don't come from a moral standpoint. Just hoping they don't lock it down any further heh ;-)

[gigatexal]

An aggregator like this that could surface the same good for the cheapest price all inclusive of delivery would be something I would pay for!

[randomNumber7]

> I do have a suggestion for your app though: Have it compare your basket of goods across different markets in your region to show you the cheapest option.

This is a great idea. I just think the use case is not that big since REWE is the worst in the price/quality ration and just going to another shop would save you more.

[duskdozer]

>I do have a suggestion for your app though: Have it compare your basket of goods across different markets in your region to show you the cheapest option.

I'd settle for just being able to sort items by unit price... I'm sure this is a [regulation-]solved problem in Germany though

[Bewelge]

> I'd settle for just being able to sort items by unit price

What do you mean? The official REWE app and website provide just that.

> I'm sure this is a [regulation-]solved problem in Germany though

Not sure what you mean by that.

[duskdozer]

Sorry, yes, I'm not German and haven't used it. It was an idle complaint about how trying to use grocery store (or other similar) sites is difficult because they prevent you from being able to sort properly, for example by unit price. Sometimes they change the displayed unit per product so you also have to convert them to compare manually (less of a problem for metric, but like, drink brand 1 €2/100ml, drink brand 2 €13/1L etc).

As I was writing it, I realized that this kind of tactic just feels like it would be banned in Germany

[tstenner]

Stores are required by law to provide the price per unit/weight/volume alongside the price, so you can directly compare the price of a pint of beer to the 0.33 liter bottle without calculating anything.

[Bewelge]

Ah thanks, didn't think about that.

I just checked and REWE only lets you sort by absolute price. But honestly, you can compare prices so much better on their website than in a physical supermarket already [0].

[0] https://www.rewe.de/shop/c/frisches-obst/?sorting=PRICE_DESC You have to enter a random zip code eg 20249

[wazHFsRy]

there is this "400g (1 kg = 3,48 €)" - would be pretty easy to sort results by that I'd guess, good idea!

[abdusco]

> Compare process across different markets.

Check out smhaggle app on Android

https://play.google.com/store/apps/details?id=com.smhaggle.a...

[Bewelge]

Oh nice, thank you. Will check it out later!

What I suspect though: They mainly show current discounts. The REWE API exposes those as a separate list for each market. There's around 3.5k markets and each can set their own discounts and has their own product catalogue with their own pricing.

So it would be 3.5k API calls to fetch all offers for all markets. Which is doable.

But fetching all products takes like 100 calls per market. It's quite a bit of data. And I think most supermarket don't publish their catalogue at all since they don't have delivery options.

[aweiher]

2.8 rating in Play Store sounds bad