Storage and synchronisation.
WHAT THE CLOUD DATABASE PROVIDES
Storage synchronised across a user's devices, tied to their account.
WHAT MAKES IT DISTINCTIVE
Storage in the user's own account allowance rather than yours No server to operate Authentication handled by the account
WHAT THAT SUITS
Applications where each user's data is their own.
WHAT IT DOES NOT SUIT
Data shared widely between unrelated users Applications needing a web presence or other platforms Complex server-side logic
WHY THAT SECOND POINT MATTERS
It is Apple-only, so an Android or web version needs something else.
WHAT THE DATABASE SCOPES ARE
Private, per user Shared, between specific users Public, to everyone using the application
WHAT TO KNOW ABOUT THE PRIVATE SCOPE
You cannot read it, by design.
WHAT THAT MEANS
You cannot support a user by inspecting their data.
WHAT TO HANDLE
Users not signed in Storage full Being offline Conflicts between devices
WHAT TO TEST
Two devices changing the same data.
