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From Fearless Code:
JamTimer is an app designed for the exciting sport of roller derby. Created for the jam-timer position, JamTimer replaces the need for using stopwatches. It has built-in configurations for WTFDA, RDCL, or OSDA style games, and can be customized for any type of scrimmage or tournament scenario. FEATURES - Keep track of all timing related tasks needed in a roller derby game. - Built-in support for WFTDA, RDCL, and OSDA game configurations.- Add custom game configurations (scrimmage or tournaments). - Large buttons, conveniently operated with one hand. - Vibrate warnings for specific events.