Jamzo

Jamzo is an app built for roller derby.

– Dedicated tools for different NSO roles Jamzo provides separate tools for the key officiating roles in roller derby:

• Penalty Box (Penalty Timer)
• Blocker Timer: track 30-second penalties for blockers
• Jammer Timer: manage jammer penalties with precision
• Dual Timer: handle both roles on a single screen
• Scorekeeper: record and manage game scores directly from your device

– Game Timing

• Jam Timer: manage the flow of a roller derby game (jams, intervals, timing)

– New: Teams Directory Access a complete list of roller derby teams with essential information:

• City and country
• Social media links A simple way to explore and connect with the roller derby community.

– Built for real game conditions

• Fast and intuitive controls
• Clear, glanceable interface under pressure
• Designed to reduce stress during games and scrimmages

– Learn the rules with Quiz mode

• Test your knowledge of roller derby rules
• Multiple difficulty levels
• Ideal for NSOs, referees, and players
• Learn while practicing

– New: Scorekeeper Tool

• A dedicated scorekeeping solution designed for roller derby games:
• Track scores throughout the game
• Record each jam quickly and accurately
• Simple interface optimized for NSOs
• Reduce paperwork and keep game information organized