Jamzo

Sports

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

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

Ratings & Reviews

  • This app has not received enough ratings or reviews to display an overview.

– 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

Version 1.2.0

The developer, Charles Robart, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Provider
    • Charles Robart
    Size
    • 45 MB
    Category
    • Sports
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    16+
    Copyright
    • © 2026 Jamzo
  • Privacy Policy

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