PenaltyTimer vs Jamzo

PenaltyTimer is the first mobile app created specifically for roller derby officials. It has since been used by leagues all over the world. Typical stopwatches can be unreliable and cumbersome to use. PenaltyTimer provides a reliable way to track penalties with built-in knowledge of the WFTDA ruleset for those tricky jammer situations. If you're short staffed at practice, managing the full penalty box is no problem! FEATURES - Manage any configuration you'd like: two blockers, two jammers, four blockers, or even the full penalty box! - Stop all timers simultaneously between jams. - 10 second warning, alerting you to tell the skater to stand up. - Tap-edit allows you to quickly edit a time or add a minute for a double-penalty. - Customizable colors to match the team uniforms. - Full support for Retina display and iOS multitasking. - Localized into eight languages.

Jamzo brings together essential tools to support teams and officials during roller derby games. NEW — CALENDAR & RESULTS • Discover upcoming roller derby games and tournaments • Browse games by date and country • View participating teams, league logos, and game times • Follow completed games and their final scores LINEUP & PENALTY TRACKER Easily track lineups and penalties throughout the game: • Record the skaters participating in each jam • Identify jammers, pivots, and blockers • Assign penalties and track Penalty Box visits • View the game history in real time • Work independently or with another operator on separate devices • Access a complete game recap • Export game data for review or archiving SCOREKEEPER • Record the score jam by jam • Follow the game’s progress in real time • Choose between solo and dual modes • View and export the game recap TIMING TOOLS • Jam Timer: track jams, intervals, and periods • Penalty Timer: time Penalty Box visits • Blocker Timer: manage blocker penalties • Jammer Timer: manage jammer penalties • Dual Timer: use two timers on a single screen TEAM DIRECTORY • Discover roller derby teams • View their city and country • Access their social media pages RULES QUIZ • Test your roller derby knowledge • Choose your difficulty level • Learn and review the rules in a fun way Jamzo features a clear, responsive interface designed to remain easy to use in real game conditions.