I’m writing an iOS app whose major profit would require amassing person app expertise knowledge over many (10 to 10,000) completely different customers, every with their very own Apple ID account (Suppose one thing like Waze the place one person experiences one thing for different person’s profit).

Can this be achieved solely with Apple iCloud tech, or will I must arrange a third-party DBMS?

My DB schema and reporting necessities are comparatively easy. If I have to go together with a 3rd social gathering … any suggestions as to which might have the only setup and integration with an iOS app can be vastly appreciated.