I am trying to post an update of my app, but unfortunately it is rejected by google with this note:
Issue found: Not a core feature
The feature you identified that is dependent on this permission does not appear to be critical to the core functionality of your app.
Core functionality is defined as the main purpose of the app. Without this core functionality, the app is "broken" or rendered unusable. The core functionality, as well as any core features that comprise this core functionality, must all be prominently documented and promoted in the app's description.
What is it that they don't like?
Issue found: Not a core feature
The feature you identified that is dependent on this permission does not appear to be critical to the core functionality of your app.
Core functionality is defined as the main purpose of the app. Without this core functionality, the app is "broken" or rendered unusable. The core functionality, as well as any core features that comprise this core functionality, must all be prominently documented and promoted in the app's description.
What is it that they don't like?