ScheduleLock is the alarm app built for teachers on rotating block schedules. Set your alarms once, and the app fires the right ones for whatever today is — A-Day, B-Day, Day 4 of a 6-day rotation, or any pattern your school uses. When the day changes, one tap handles it.

WHO IT'S FOR
Teachers, coaches, and staff at schools that run rotating block schedules. If your day is "A-Day, B-Day, A-Day…" or "Day 1 through Day 6," ScheduleLock is built for you.

HOW IT WORKS
- Tell ScheduleLock your term start, term end, and rotation pattern once during setup.
- Build alarm groups for each day type (e.g. "A-Day Alarms," "Day 3 Alarms," "Every School Day").
- Each morning the app fires only the alarms that belong to today.
- Weekends and dates outside your term are skipped automatically.

ONE-TAP DAY OVERRIDE
Snow day, two-hour delay, assembly schedule, dentist appointment? Tap Day Override:
- Full Day Off — silences every alarm for today.
- Custom — silence specific alarms only, keep the rest.
Tomorrow returns to your normal rotation automatically. No re-arming, no remembering.

RELIABLE BY DESIGN
- Local alarms scheduled with the device's exact-alarm system — no push servers, no cloud, no delay.
- Works fully offline. No internet, no account, no sign-in, ever.
- Survives device reboots — pending alarms are restored after restart.
- Custom labels per alarm, snooze duration of your choice, choice of built-in alarm sounds.

NOW ON IOS AND ANDROID

PRIVACY YOU CAN VERIFY
- No ads.
- No tracking, no analytics, no telemetry.
- No network access — your schedule stays on your device.
- No account required.

Free to install. Built for teachers, not advertisers.