Which platform is challenging for app developers. . Android or ios ?

Answer 1

iOS of course. These are the reasons of that:
- Apple made a "transition" from Objective-C that was used by Apple for years to Apple's new programming language, Swift. And they work side by side, so the developer has to learn 2 languages.
-XCode, the only IDE and compiler of Swift UI apps along with the code signing utility cannot be used on Windows. Only on Mac. So you have to buy a Mac.
-Every app needs to be codesigned otherwise it cannot be installed on the device or submitted to the appstore. Android has
More freedom because it allows you to sideload APKs directly on your device.

Answer 2

Android, for android you require knowledge of Java, for IOS, swift is used, wich is much easier