Looking at Brainrot's UI, they display both "Screen Time: 6h 31m" and a calculated "Health: 91/100" score with a "Tap to Fix" button. This suggests manual sync or a workaround.
Specific Questions:
Can DeviceActivityReport extensions communicate data back to the main app? (CloudKit, Notifications, Shared files?) Can extensions write to UserDefaults on physical devices? Do commercial apps rely on manual user sync? Is there an alternative API I'm overlooking? Do threshold-based approximations work reliably for daily tracking? I can extract exact minutes in the extension but can't export them to the main app due to sandbox restrictions. Either a technical solution or confirmation that manual sync is the industry standard would help greatly.