Interval Reminder

Interval Reminder does one thing: it nudges you at a fixed interval, but only inside the part of the day you choose. Set a start time, an end time, and an interval in minutes. From 08:30 to 21:00, every 20 minutes. That is the whole setup. Outside that window the app stays quiet. WHAT IT IS GOOD FOR • Standing up and stretching during long desk hours • Drinking water through the working day • Eye breaks on a 20-minute rhythm • Posture, breathing, medication timing • Any habit that needs a rhythm rather than a single alarm HOW IT WORKS • Pick your daily window and interval — 1 to 600 minutes • Press start; a live dial shows the countdown to the next reminder, how far through the window you are, and how many reminders have fired today • Reminders arrive as ordinary notifications with sound and vibration • Reminders survive a reboot and pick the schedule back up automatically A NOTE ON SOME PHONES Honor, Huawei, Xiaomi, OPPO and vivo devices block apps from starting themselves after a restart unless you allow it. If your reminders stop after you reboot the phone, open the app once, or allow Interval Reminder to auto-start in your phone's battery or startup manager. BUILT TO STAY OUT OF THE WAY • Completely offline — the app has no internet permission at all • No account, no sign-in, no cloud • No ads, no tracking, no analytics, no third-party SDKs • Nothing is collected, and nothing leaves your phone: your window and interval are stored locally • Free, with no paid tier and nothing to unlock Interval Reminder uses exact alarms so a 20-minute interval means 20 minutes, not "sometime later when the system feels like it". That is the entire point of an interval reminder, so the app asks for the alarm permission it needs and nothing else. Available in English, 中文, العربية, Español and Français. On Android 13 and newer you can set the app's language on its own, independent of the system language.