Which language can access me phone hardware

Question

I want to use mob features in sololearn campilear
https://www.sololearn.com/discuss/2874222/?ref=app

Answer 1

none. Code Playground executes in the server so it is very limited, it isn't designed for commercial use

Answer 2

Depends on phone os.

If Android then Java is best.
If IOS, then Swift or Objective C is the way to go.

You ll have to understand what hardware features are exposed via the operating system.
The best way to learn this would be to try making your Android app and see what you can access.