iCloud & iCloud Drive
can edit or upload files from many apps to be available on multiple devices:
- Contacts — via syncing
- Calendar — via syncing
- Mail — via syncing
- Music — various Apple Music options
- Notes — store and edit Notes on iCloud as well as on local device
- Photos — various sharing and iCloud storage options
iCloud creates and stores document files for some Apple Apps by default for use with HandOff:
- Numbers
- KeyNote
- etc.