Blitz: Fischer Chess Clock

A chess clock made for blitz

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 Fast and intuitive controls

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 Robust time implementation

Uses the most precise time source available on the device Clock implementation tested with 100% code coverage Free and secure

Free software with reproducible builds Meets Android 15 security requirements Enables memory tagging on compatible devices