How are things in flutter/react native with calling platform system functions?

Question

Mobile development

Can I create an alarm clock app on flutter, for example? I read that some of the system functions of the platform can be called, but when connecting individual libraries (for example, push notifications), some of the functions cannot be called and one must resort to native development. So how do you still understand the limits of the possible? .. Is there any list of what can be done and what cannot?

Answer 1

You need to look at what is there.
If something is missing, you will have to write in native. Flutter makes this easier.
A couple of lines in Dart, a couple of lines in native - and the connection is ready, then write the logic.

Answer 2

Start from existing tasks and solve problems as they come, no need to try to solve something that does not exist yet.

Answer 3

Flutter seems to be more or less normal, but I won’t say anything about react