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Tap the day in the Calendar view, then "View sessions" → tap the + button to add a session manually. You can also edit existing sessions by tapping them.

Yes. Go to Settings → "Backfill past treatment." You'll be able to estimate your wear time over the period before you started tracking. The app marks these as estimated rather than tracked.

Make sure notifications are enabled for 22 Hours in iOS Settings → Notifications → 22 Hours. Reminders fire at 8 PM the night before your switch and 7:30 AM the day of.

Yes. When you're signed into iCloud on iPhone and iPad, 22 Hours mirrors your data through your private iCloud database automatically. We never see it; only you do.

Go to Settings → Danger zone → "Redo onboarding." Your wear history will be kept; just the treatment configuration is reset.

Yes. Within a single treatment plan, 22 Hours follows your initial run plus any number of refinement courses. When your orthodontist hands you a new set of aligners, whether mid-treatment or after the initial run. Go to Settings → Adjustments → "Start refinement." Each course gets its own aligner count, cadence, and daily goal, and your wear history carries through.

No. Statistics like streaks, weekly average, and goal hit rate count only real tracked sessions, not estimated history. Backfilled sessions are still visible in your Calendar and History views.

All data is stored locally on your device using Apple's SwiftData framework, and in your iCloud, so it stays in sync across your devices. We don't operate a server, run analytics, or have access to your information. Read the full privacy policy.

Tap the day in the Calendar view, then "View sessions" → tap the + button to add a session manually. You can also edit existing sessions by tapping them.

Yes. Go to Settings → "Backfill past treatment." You'll be able to estimate your wear time over the period before you started tracking. The app marks these as estimated rather than tracked.

Make sure notifications are enabled in Settings → Apps → 22 Hours → Notifications. Switch reminders use exact alarms, so if your phone asks, also allow "Alarms & reminders" for 22 Hours. Reminders fire at 8 PM the night before your switch and 7:30 AM the day of.

Yes. You can turn on Cloud Backup in Settings → Cloud Backup and sign in with Google, and your treatment and wear data is backed up to a private folder in your own Google Drive that only you (and the app) can access. It's optional and turned off by default.

Yes. With your permission, 22 Hours can add aligner-change reminders to your device calendar, or to a dedicated "22 Hours" calendar in your Google account if you connect one. It only manages the entries it creates.

Go to Settings → Danger zone → "Redo onboarding." Your wear history will be kept; just the treatment configuration is reset.

Yes. Within a single treatment plan, 22 Hours follows your initial run plus any number of refinement courses. When your orthodontist hands you a new set of aligners, whether mid-treatment or after the initial run. Go to Settings → Adjustments → "Start refinement." Each course gets its own aligner count, cadence, and daily goal, and your wear history carries through.

No. Statistics like streaks, weekly average, and goal hit rate count only real tracked sessions, not estimated history. Backfilled sessions are still visible in your Calendar and History views.

All data is stored locally on your device. We don't operate a server, run analytics, or have access to your information. The only data that can leave your device is the optional Google Drive backup above, stored in your own Google account. Read the full privacy policy.