single platform or Cross platform for Mobile application?

Answer 1

Better to know one platform well because you will find jobs. Than learn a cross platform tool and possibly pick the wrong one. If you know one platform, those cross platform jobs will teach you.

Answer 2

If u are making complex or like aiming in system i recommend u to use single platform(kotlin and java for Android with Android studio ide and intellij idea or swift and object c for iOS with xcode) and u will be able to build better ui

Answer 3

Cross platform
Ps.
Check out svelte native