0 · This device
Type a short label, e.g. iPhone 15 · iOS 26.1 · installed. No names.
1 · Storage
Ask the browser to keep this app's data permanently, and see how much space it allows.
2 · Start-up and database speed
After you fully close the app (swipe it away / quit the browser) and open it again, press:
Speed tests replace the made-up transactions each time:
3 · Offline and installation
- Install:
- Turn on airplane mode, fully close the app, open it again. It should load with your data.
Launches recorded in this storage
4 · Passkey
Creates a test-only passkey called "Compatibility TEST passkey (safe to delete)". Delete it afterwards in your password settings.
5 · Backup and recovery
Each method is tested on its own: make the backup, clear this site's data in the browser or phone settings, reopen, then restore.
A · Plain backup file
B · Encrypted with a recovery key
C · Encrypted, unlocked by passkey
6 · Eight-day storage test
Do this last on day 0, in the installed app and in the browser tab separately. Then don't open either for at least 8 days.
7 · Results
The results file has measurements and pass/fail only: no personal data.