App Programming - What's the best language?

Question

My end goal is to develop a smart phone app usable on iOS and Android as well. It would work like a social network on which you can have friends through the app or you could add friends through something like facebook which would be connected I suppose. With an app like this I understand that it would be a good idea to learn SQL in order to build a database for all of these user profiles and such, but as far as developing the app itself to work on both phone platforms is there 1 language that will work the same between the 2 or do I need to learn more than just 1? I've read that Python is easy and can be used to develop apps but at the same time I have yet to see examples of apps made in it.

Answer 1

Sounds like you need a cross-platform app development framework or a development tool. Xamarin is rather popular but I've never used it.

Answer 2

Kotlin I think so

Answer 3

even java can be used

Answer 4

if you want to make web apps go with html5 css js