I know Android and iOS can back up app’s data files, the backup data is then allowed to be transferred from old device to new device.
For android, I understand that we can disable backups for your application with <application android:allowBackup="false" ... in AndroidManifest.xml file. I wonder if iOS has the same?
The backup scheme on iOS is more complicated than on android. There is no simple attribute such as android:allowBackup="false" to disable the backup feature globally.
we could use the SetSkipBackupAttribute function to control whether backup my files.
NSFileManager.SetSkipBackupAttribute (filename, true); // backup will be skipped for this file
Detailed info is here.