I learned c,c++ ,kotlin, html . Now i want to make any app. How to make app .

Search on Google and YouTube there are lot info

learn a GUI, for C++, I suggest QT. but you can look other GUIs for other languages on the internet except HTML.

to program android applications, I advise you to learn Kotlin, but first start java. I recommend the program android studio, intellij IDEA

https://developer.android.com/studio