Jamzo is a roller derby game-management utility for officials and team staff on iOS.
The App DNA
What makes this app unique?
It removes the coordination friction of manual paper-based tracking by enabling real-time, multi-device data entry during fast-paced games.
For Roller derby officials, team staff, and scorekeepers requiring specialized timing and tracking tools.
What does it look like?
Key features
Records skater participation per jam and tracks penalty box visits in real time.
Allows multiple operators to work on separate devices for simultaneous data entry.
Provides dedicated timers for jams, intervals, periods, and penalty box durations.
How much does it cost?
Jamzo is currently offered as a free utility with no visible subscription or IAP gates.
Velocity
Maintenance developmentnew contentUX improvementsShow more...
With only one release shipped in the last 14 days, the app currently operates at a maintenance cadence. The latest update represents a significant feature expansion, focusing on utility for game management and data export. Development appears to be in an early, feature-building phase rather than a high-frequency release cycle. Future momentum will depend on whether this initial feature set is followed by iterative updates or a period of inactivity.
Who built it?
User Sentiment
What do users think recently?
How are ratings & reviews evolving?
Not enough recent reviews to extract reliable themes yet.
Read the full review analysisCompetition
Competitive landscape for Jamzo
How's the Sports market?
Jamzo occupies a specialized niche in the Sports category, currently maintaining a free-utility position with no IAP gates. The recent addition of lineup tracking in the latest release signals an effort to capture more of the game-day workflow.
Read the market outlookThe rivals identified
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Access the full report for freeThe Analyst's Read
Key takeaways for Jamzo
Where is it heading?
The roller derby utility market remains fragmented, with most officials relying on manual tracking. Jamzo's ability to capture this market depends on its transition from a personal tool to a tournament-standard record-keeping system.
- The latest release introduced lineup and penalty tracking, indicating active development of core game-day workflows.
- The current free-access model lacks monetization, which may constrain future feature investment if the developer cannot capture league-level value.
The SWOT
- Dual-device synchronization removes manual coordination friction
- Standardizing tournament record-keeping via league-wide data export
Next best moves
Audit 17+ content rating because it creates friction for school-affiliated leagues → increase potential user base
+ 1 more prioritized moveThe counter-intuitive read
The 17+ content rating is a hidden retention risk…
Read the full takeSince the last report: The analysis shifted from a general feature-tracking focus to identifying specific administrative and B2B growth barriers, specifically the 17+ content rating and the need for standardized tournament data export.
Bottom line
Jamzo provides essential utility for derby officials, but the current free-access model limits the developer's ability to scale. Establishing the app as a tournament-standard record-keeper would unlock B2B-style distribution into leagues, moving the product beyond a simple timing tool.
Unlock 1 critical friction, 1 market threat, 1 more prioritized move and the analyst’s take.
Access the full report for freeFAQ
Is Jamzo suitable for official roller derby tournaments?
Does Jamzo require an internet connection during games?
What is the cost to use Jamzo's full feature set?
Sources
- [1] App Store, source
Report last updated