Up to which programming language i have to learn to develop a simple book like app ?

Question

If you know good website ko create you can suggest ☺

Answer 1

Define simple. In general, all programming languages are equal (turing complete), means you can do everything with each of them. But for your purpose may Java, JavaScript be a good guess.

Answer 2

Java,Kotlin for android apps. Swift for iphons , Dart: for android and iphons ....