What platform is better in terms of revenue for the developer?

Android or iOS?

I think iOS. Android has many more users, but a much smaller percentage of them is willing to spend money to buy apps.

@JS96 what about in terms of ad revenue?

@jdmkaan In that case, in my opinion, Android is better. But if you want to release an adfree app, do it on iOS. Of course if you can, do it on both.

It's iOS hands down. No platform is "better", it's all up to individual choice. Though apple provide the least value for money 😔

Oh, for ads, it depends whether the initial app is free. If it is, Android, else iOS

Why not both? Most ad networks have APIs for both android and iOS. I think iOS would be more profitable because people would be more willing to download the app, but I don't really like Java so that might be slightly biased.