the Fitbit mobile app
A 40 & 25 second play clock for NFHS and NCAA football officials and referees.
Bottom button starts the 40 second clock.
Top button starts the 25 second clock.
For Versa 2 and Versa Lite, tap the screen to start the play clock. Tap a second time to switch between a 40 and 25 second play clock.
Clock can be reset to 40 or 25 while the clock is already running.