It has sufficient list of programs: browsers (I use firefox), ebook readers, fractal (matrix), telegram, maps, that works good enough on mobile at least for my daily use.

There is no need to ask GPT for a ready-to-use code, it does not work well for it. But it explains someone else's complex code much better. Students need to ask it for short hints in places where it is not clear specifically or very small parts of the code, then it brings good benefits.