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My use case is:
Questions:
Will iClould keep user's data that was belonging to the deleted app? (Based on my experiment, the data is kept on iCloud when my App is deleted, however, I am not sure whether the behaviour is official).
If the answer is Yes, then I have the following questions:
a. How user's data eventually get deleted/cleared from user's iCloud storage? (My concern is that if the user decide never to use my app again, the data would become useless therefore should be cleared on iCloud to free spaces)
b. If user decide re-download my app, how can he get access to the data iCloud he originally uploaded?
c. Can I manage the user's data from iCloud web portal (www.icloud.com)? I don't see my uploaded document appears in iCloud web portal, even I put my files under "Documents" subfolder.
d. Is there any official documentation that describes this behavior?
Thanks in advance!
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On iCloud.com, you can immediately and permanently remove files you deleted from iCloud Drive, iWork apps, or other apps within the last 30 days, whether you deleted them on iCloud.com or another device that has iCloud Drive turned on.
Turns out, your data doesn't magically disappear when you delete an app. Apps are often part of an intricate web of interconnected tools, products, and sites that track and share your information, likely without you even realizing it.
You can delete apps from your iPhone's Home Screen, which will erase any saved data. You can also offload an app to save its data and settings if you end up re-installing it. On iOS 14 or later, you can hide apps from your Home Screen and access them through the App Library.
Delete backups and turn off iCloud Backup for your device. You can delete old iCloud backups for the device you're currently using, or older devices you might not use anymore. iCloud backups are available for 180 days after you disable or stop using iCloud Backup.
Yes, iCloud will keep a person's data belonging to the deleted app by default.
Follow up questions
A: The data will stay in iCloud storage until the person decides to delete the data. Using the Settings app, a person can manage their iCloud storage, down to turning off backups of each app's storage. Or the entire backup for a device can be deleted to start over with a fresh backup.
B: If a person reloads an app on their iOS device, meaning any app with the exact same App ID so it could be an updated version, iCloud should restore the data from the app's backup.
C: No, the iCloud Web portal only gives access to the apps loaded by Apple, currently Mail, Contacts, Calendar, Find My iPhone, and iWork. Apple could offer the ability to add apps to the iCloud Web portal, just like we add apps to our iOS and Mac devices. But that would be some future offering.
D: Much of this is documented in the developer documentation. Some of this answer is undocumented, and gleaned from experimenting with iCloud (so please correct me where I'm wrong).
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