Tranquil Stopwatch is a reliable stopwatch designed for extended use with minimal power consumption. It is particularly well-suited for non-interactive sessions, such as meditation or long periods where you cannot actively interact with your device but still need to track elapsed time and know the current time.

**Key Features:**

- **Power Efficiency**: Optimized for long-duration use, with a black AMOLED-friendly screen and no milliseconds display to minimize power consumption. Please note that this app operates without any background service.
- **Reliability**: Ensures accurate timing without deviations, even during extended periods of use.
- **Simple Operation**: Easily pause, resume, and reset the timer; no additional features like laps.
- **Current Clock Display**: Shows the current time in addition to the stopwatch, perfect for sessions where constant interaction is not possible.
- **No Disruptions**: The app does not interrupt you with advertisements, review requests, or other prompts, ensuring a smooth and distraction-free experience.
- **Optional Audio Beepers**: Create audio alerts during your stopwatch sessions to keep track of the elapsed time without watching the screen.

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid

• Version 1.12.1 (17) suggested Added on Feb 07, 2026

  This version requires Android 8.1 or newer.

  It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

  Permissions

  • tibarj.tranquilstopwatch.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 2.4 MiB PGP Signature | Build Log

New in version 1.11.0
New feature: Customizable Audio Beepers
• Create up to 10 custom beep alerts during stopwatch sessions
• Configure frequency, duration, waveform, and volume for each beeper
• Set precise timing: delay, repetitions, and intervals
• Option to override silent mode (play beeps like alarms)

• Version 1.11.0 (16) - Added on Jan 25, 2026

  This version requires Android 8.1 or newer.

  It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

  Permissions

  • tibarj.tranquilstopwatch.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 2.4 MiB PGP Signature | Build Log

New in version 1.10.1
Fixed icon background

• Version 1.10.1 (15) - Added on Aug 07, 2025

  This version requires Android 8.1 or newer.

  It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

  Permissions

  • prevent phone from sleeping
    Allows the app to prevent the phone from going to sleep.
  • tibarj.tranquilstopwatch.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION

  Download APK 2.2 MiB PGP Signature | Build Log