ℹ️ Enable iCloud end-to-end encryption:
- Nobody knows that, but iCloud actually supports end-to-end encryption (see “Advanced Data Protection for iCloud”) but it’s disabled by default. If you care about data privacy, you should turn it on.
- System settings→- Apple ID→- iCloud→ Set- Advanced Data Protectionto- On.
- System settings→- Apple ID→- iCloud→ Disable- Access iCloud Data on the Web.
 
- It supports almost all the native Apple apps, with the notable exceptions of iCloud Mail, Contacts, and Calendars. See official data protection matrix for more info.