Interval reminders and exercise timer with precise scheduling
A dual-purpose timing app combining configurable interval reminders with a workout timer. Features day-of-week scheduling, quiet hours, exercise presets, an 8-sound library with custom audio import, and precise AlarmManager scheduling that survives app kill and device reboot.
Uses AlarmManager for exact timing -- WorkManager cannot guarantee this level of precision.
Features
Everything you need for precise interval timing and structured exercise sessions.
Precise Scheduling
AlarmManager chain-scheduling for exact intervals from 1 second to 23h 59m. Survives app kill and device reboot.
Exercise Timer
Work/rest intervals with circular countdown, configurable sets (1-99), and sound cues at phase transitions.
Quiet Hours
Set start and end times for automatic reminder pausing. No interruptions during sleep or meetings.
Sound Library
8 built-in sounds (Chime, Bell, Ding, Gong, Whistle, Beep) plus custom audio file import with preview playback.
Exercise Presets
Save and instantly load named exercise configurations. One tap to start your routine.
Tiny Build
Only 2.84 MB after R8 optimization (from 59 MB unminified). Dynamic Material 3 colors with system theme integration.
Permissions
Minimal permissions required for reliable alarm scheduling and background operation.
Exact Alarm Schedule precise AlarmManager alarms Notifications Show reminder and timer alerts Wake Lock Keep CPU active during alarm delivery Foreground Service Run exercise timer in foreground Boot Completed Reschedule alarms after device reboot
Install the APK
Download the 2.84 MB release and allow installation from unknown sources when prompted.
Grant alarm permission
Android 12+ requires explicit exact alarm permission. The app will guide you to the system settings screen.
Configure and start
Set your interval, choose a sound, pick active days, and tap start. Reminders persist across app kills and reboots.
Tech Stack
Built with modern Android tooling for reliability and a small footprint.