Blitz: Fischer Chess Clock
- Defaults to 5+3 Fischer timing: 5 minutes + 3 seconds per move
- FIDE-compliant: initial time for 5+3 is 5:03, not 5:00
- Privacy-friendly: no ads, no permissions
- Touching the screen switches to the next player
- Horizontal and vertical dragging set the time and increment
- Haptic feedback is enabled by setting the ringtone to vibrate
- Back gestures pause and reset the clock
- Uses the most precise time source available on the device
- Clock implementation tested with 100% code coverage
- Free software with reproducible builds
- Meets Android 15 security requirements
- Enables memory tagging on compatible devices
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-
This version requires Android 5.0 or newer.
It is built by F-Droid and guaranteed to correspond to this source tarball.
Download APK 0.6 MiB PGP Signature | Build Log
-
This version requires Android 5.0 or newer.
It is built by F-Droid and guaranteed to correspond to this source tarball.
Download APK 0.6 MiB PGP Signature | Build Log
-
This version requires Android 5.0 or newer.
It is built by F-Droid and guaranteed to correspond to this source tarball.
Download APK 0.7 MiB PGP Signature | Build Log