How many language we need to make an single app and can we make app with singla language

Answer 1

I would say most apps are written in a single language like Kotlin, Java or Swift.

Answer 2

Ofcurse you can, there's a lot of powerful programing language to do not just one app for a specific type of apps, there is also a language for do more app types, scripts and more just choose what is helpful for you and making what kind of app you want a lot better and shorter

Answer 3

If it's not web app where you need to know HTML, CSS and some programming languages like JavaScript,PHP....
You can make perfectly good desktop app with single programming language.
But even if you choose do make good dasktop app you need to decide which libraries of that language to use.

Answer 4

2 languages for app is normal. Apps can be writed on C++ and Assembly languages.