Comparison

Trackkarma vs Jamzo

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Trackkarma

This app simplifies league management for sports teams, centralizing practice sessions, game organization, skill tracking, and communication. It offers an intuitive interface for coaches and members to manage attendance, rosters, and performance data.

Highlights
  • Practice session creation and attendance tracking
  • Game organization and roster management
  • Skill achievement tracking
  • Centralized document sharing
  • League-wide communication tools
  • Event calendar and notifications
Features
Read full description

Managing a league can be complicated. Between the data lost in spreadsheets and the information scattered on social networks, communication between members is not always easy. With Trackkarma, we provide a powerful and intuitive application to eliminate these inconveniences and help you manage your league without the fuss. Developed by and for the derby community, Trackkarma aims to be as complete as possible while being accessible to anyone. The many features have been designed to be easily usable thanks to an intuitive and refined interface, accessible on computers, tablets and smartphones. PRACTICE SESSIONS Training is the basis of the life of your league, but monitoring each member is sometimes complicated. Simplify their management and eliminate inconvenience thanks to Trackkarma and its advanced features: • Create single and recurring sessions • Individual and team attendance tracking • Program preparation by trainers • Calculation of minimum attendance rate required • Charts and summaries of attendance for the season GAMES The organization of games requires quite substantial logistical work. This is sometimes complicated by difficult communication and the scattering of relevant documents and information. Trackkarma makes it all very easy, while offering innovative features! • All practical information gathered in one place • Availability request and attendance calculation • Creation and export of rosters • Creation of the game officials crew among the officials of your league or by inviting external officials • Import of WFTDA Stasbooks and graphical visualization of game statistics MINIMUM SKILLS The career of roller derby players necessarily begins with learning basic skills. These minimum skills are an essential prerequisite to guarantee a good preparation for the competition. Trackkarma offers several tools to assist in this learning. • List of skills required to be assessed • Feedback from coaches • Skill achievement tracking charts • Summary of the evolution of skills COMMUNICATION Sharing information between league members is not always easy. Between the messages exchanged on social networks and the documents shared in a hazardous way, it is easy to miss crucial communications. Trackkarma eliminates all these worries! • Centralization and sharing of documents • Discussions and messages • Notifications • Shared calendar

About

Jamzo

Features
Read full description

Jamzo brings together essential tools to support teams and officials during roller derby games. NEW — 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.

Screenshots

Trackkarma4 screens
Jamzo4 screens

Verdict

The call

The clearest difference is update cadence: Trackkarma at every 2 weeks against Jamzo's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Trackkarma ships an update every 2 weeks, Jamzo every 6 weeks. The most recent releases landed on September 17, 2026 and September 3, 2026 respectively.

Scorecard1 real difference · 8 level
Trackkarma versus Jamzo: the parameters behind the verdict, then further details
ParameterTrackkarmaJamzo
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.615.1 — better
Further details — not scored
Size46 MB44 MB
Age rating4+17+
DeveloperChristophe GoffartCharles Robart

In-app purchases

None

Trackkarma

No in-app purchases

None

Jamzo

No in-app purchases

Questions

Is Trackkarma free?
Trackkarma is free to download, with no in-app purchases.
Is Jamzo free?
Jamzo is free to download, with no in-app purchases.
Do Trackkarma or Jamzo have ads?
Neither Trackkarma nor Jamzo shows ads.
Which is updated more often, Trackkarma or Jamzo?
Trackkarma ships an update every 2 weeks, and Jamzo every 6 weeks. Most recently, Trackkarma was updated on September 17, 2026 and Jamzo on September 3, 2026.

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