New ask Hacker News story: iOS: Apps persist data after full deletion
iOS: Apps persist data after full deletion 5 by WorldDev | 2 comments on Hacker News. I noticed that apps retain info after being deleted. That means we are tracked by the app even after we deleted it. For example, if I delete whatsapp or instagram, choosing to delete all data, then restart the phone and reinstall the app, it will automatically know my account. So there is clearly a persistence mechanism that it uses. I tried to understand which one. - UIDevice.identifierForVendor Apple clearly states this identifier is changed as soon as all apps from the same vendor are deleted. that's what I tested, so this identifier is not the culprit - DCDevice.generateToken This only stores 2 bits on the device, so not enough to store a username - Keychain services (password) I checked in the password app, no password was saved for these app - iCloud Keychain I turned off this feature Does anyone know the technical way apps persist data even after total deletion? One of the big appeals of...