How to simplify the server side of an iOS application?

Question

iOS

An iOS application is being made. Under one person, without an apstor.
So that its data is not accidentally lost (for example, if the device is lost or replaced), the data must be stored not only on the device, but also on the server.
In order not to increase the cost of development and not to cut the bike, I would like to use something ready-made.
Advise what exactly, plz.
ZYZH idea to back up to the cloud (Googledrive or Dropbox) shallows. The truth is, I still don't understand why. It seems to be simply because it is not feng shui.

Answer 1

Keychain, Realm, Firebase