JamTimer Downloads & RevenueJamTimer - for roller derby · App Store
JamTimer - for roller derby is #88 in Sports Paid in Australia and charting in 3 of 30 countries we track.
Updated 11 Nov 2026 · rankings refresh through the day
25 Sep 2026JamTimer - for roller derby update history & changes
Last change · 9 events since 23 May 2011Full timeline ↓Full timeline · 8 events in the last 12 months
- 📈JamTimer - for roller derby entered the top 100Top Paid · Sports · GB
- 📈JamTimer - for roller derby entered the top 100Top Paid · Sports · US
- 📈JamTimer - for roller derby charting in a new countryUnited States
- 📈JamTimer - for roller derby entered the top 100Top Paid · Sports · AU
- 📈JamTimer - for roller derby charting in a new countryUnited Kingdom
- 📈JamTimer - for roller derby charting in a new country in 2 chartsAustralia · Canada
- 🆕JamTimer - for roller derby first spotted by AppInsider#28 in Top Paid · Sports · Brazil
- 🆕JamTimer - for roller derby released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Sports PaidJamTimer - for roller derby on the App Store
App details
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Australia | SportsPaid | #88 |
| Brazil | SportsPaid | #119 |
 Canada | SportsPaid | #126 |
Apps near JamTimer - for roller derby on the chart
Sports Paid, around #88.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about JamTimer - for roller derby
From the 9 most recent App Store reviews in the US.
Mostly positive (100% of recent reviews give 4–5 stars). People like it for being easy to use, and being useful.
What people like
- Ease of use: “This app made easy work of my job”
- Useful: “I highly recommend this app for anyone who has the pleasure of jam timing”
- Price & subscription: “And reasonably priced too :) this is a great app”
About JamTimer - for roller derby
FEATURES
- Keep track of all timing related tasks needed in a roller derby game.
- Built-in support for WFTDA, RDCL, and OSDA game configurations.
- Add custom game configurations (scrimmage or tournaments).
- Large buttons, conveniently operated with one hand.
- Vibrate warnings for specific events.
