# JamTimer vs Trackkarma

The clearest difference is price: Trackkarma at Free against JamTimer's $1.99. Trackkarma also leads on update cadence (every 2 weeks vs every 5 months). JamTimer's advantage is ratings volume (9 vs 1) and iOS requirement (13.0 vs 15.6). On rating, ads, in-app purchases and device support there is nothing between them.

Trackkarma is free to download; JamTimer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for JamTimer against 5.0 for Trackkarma. That said, the two scores are not equally well evidenced: JamTimer has 9 ratings behind it against 1, so its average is the more settled of the two.

JamTimer ships an update every 5 months, Trackkarma every 2 weeks. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | JamTimer | Trackkarma |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [5.0 (9 ratings)](https://appshunter.io/ios/app/jamtimer-for-roller-derby/id435346062/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/trackkarma/id6473739561/reviews) |
| Number of ratings | **9** | 1 |
| Positive reviews | 93.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Paid | **Free** |
| Size | 1 MB | 46 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Fearless Code](https://appshunter.io/developer/312416741) | [Christophe Goffart](https://appshunter.io/developer/1719639459) |

## What reviewers say

### JamTimer

[App page](https://appshunter.io/ios/app/jamtimer-for-roller-derby/id435346062)

This app is a dedicated tool for roller derby jam-timers, replacing traditional stopwatches. It offers pre-set configurations for major leagues and allows for custom settings for any game scenario. Large buttons and vibration alerts ensure easy operation during fast-paced matches.

**Highlights:** Roller derby jam-timing, WFTDA, RDCL, OSDA configurations, Custom game settings, One-hand operation, Vibrate warnings

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Trackkarma

[App page](https://appshunter.io/ios/app/trackkarma/id6473739561)

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:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JamTimer free?

JamTimer costs $1.99, with no in-app purchases.

### Is Trackkarma free?

Trackkarma is free to download, with no in-app purchases.

### Which has better reviews, JamTimer or Trackkarma?

JamTimer and Trackkarma are both rated 5.0 out of 5 on the App Store, from 9 and 1 ratings respectively.

### Do JamTimer or Trackkarma have ads?

Neither JamTimer nor Trackkarma shows ads.

### Which is updated more often, JamTimer or Trackkarma?

JamTimer ships an update every 5 months, and Trackkarma every 2 weeks. Most recently, JamTimer was updated on October 3, 2026 and Trackkarma on October 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*