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Jam Timer 4 Roller Derby Gameplay, Trailers and Related Videos

Watch Roller Derby Referee Training - Initiation - Ref-Ed.com video.

Watch TUTORIAL - JAM TIMING video.

Watch The Zen of Reffing Roller Derby - Lesson 10: Jammer referees video.

Watch Mental Training in Roller Derby video.

Watch Jam Sesh- Vlog #1 | Roller Derby video.

Watch The Roller Derby Pioners Jolters 5 video.

Watch A'Bout Jam Time video.

Watch #Minimumskills part 2 / 1.4 Speed and endurance video.

Watch Sim Settlements Patch Notes v4.0.1 - SS Lite + Jammer Unjammed video.

Watch Demolitia Jam video.

About the application:

Features contain: * Hold track of period, jam, and timeout times * Apk will automatically hold track of the number of jams and the timeouts taken by both squads. * Apk can be configured to automatically switch on flight mode when the apk is launched, and switch it off when the apk closes. * Audio / visual / vibrate reminder when 10 seconds of the jam /period / timeout are remaining * Option to keep overtime jams at the end of a bout. * Squad names can be customised * Timer background can be customized. Add your League's logo, squad image, or any photo you like. * Preferences let you to customize period, timeout, interval and jam time, reminder tone and/or vibrate, and to prevent accidental closure of the timer when pressing the back key * Apk can prevent display from dimming / timing out during use. * Remaining period time can be adjusted if important. * Useful for practice sessions and scrimmages. * Select to automatically begin jams or select between starting jam or taking a timeout.