How to sync app between devices?

Question

iOS

Hello,
I ask you not to hit hard with your feet, I'm a beginner in development. I want to make an application something like a ToDo sheet with synchronization between iPhone and iPad. Tell me, do I understand correctly that in this case it is necessary to connect iCloud CoreDate to the application? And synchronize, roughly speaking, the data in it.

Answer 1

core data is a framework for storing and working with data.
a for synchronization, icloud or dropbox or any other similar service is used.