Is it possible to have environment like Xcode or Visual Studio on the tablets like Ipad for example?

Question

I have seen only online compilers

Answer 1

Well you can, but it takes additional effort to do so and you probably wont be left with much space on your drive afterwards mind you.
There are compilers that can compile offline too, they are on the play stores.

Answer 2

The closest to a full IDE that I've seen on Android was AIDE, and it's not that good.