JamTimer vs Stack Team App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JamTimer
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.
- Roller derby jam-timing
- WFTDA, RDCL, OSDA configurations
- Custom game settings
- One-hand operation
- Vibrate warnings
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JamTimer is an app designed for the exciting sport of roller derby. Created for the jam-timer position, JamTimer replaces the need for using stopwatches. It has built-in configurations for WTFDA, RDCL, or OSDA style games, and can be customized for any type of scrimmage or tournament scenario. 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.
Stack Team App
This platform allows sports teams and clubs to create their own customizable smartphone apps and websites. It offers features for communication, event management, payments, and merchandise sales, enhancing club professionalism and engagement.
- Instant news, event, photo, and video sharing
- Event promotion, reminders, and attendance tracking
- In-app payments and merchandise sales
- Customizable access groups for members
- Private messaging and group chats
- Surveys and in-app voting
- Sync team events with smartphone calendar
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Stack Team App is a FREE and secure platform enabling any sports team or club to create their own customisable smartphone app. It also includes a free website that updates dynamically with your app. If your Team has created an app then download Stack Team App, sign-up and join your team. To create your own Stack Team App visit www.teamapp.com, or create your team directly via the app. Stack Team App is one of the world’s premier smartphone apps for sports club communication used by millions of people in over 150 countries! QUICK SUMMARY Stack Team App is suitable for anyone from small social teams to large clubs with thousands of members. Engage with members, coaches and players with your choice of features: APP FEATURES • Send news, events, photos and videos instantly to your members' smartphone via push notifications. • Promote events, send reminders, manage RSVP’s and track attendances. • Instantly create and receive in-app payments from members using the Team Payments feature. • Create separate access groups such as players, parents and coaches to streamline communication. • Sell mobile tickets, merchandise & memberships directly via the Store in your app or website. • Engage in instant private messaging or group chats. • Create surveys or in-app voting to gather information from your members. • Send newsletters & documents. • Link your app to ladders, schedules, results & live scores for multiple teams. • Sync your team’s events with your smartphone calendar. • Easily invite members via the app, or bulk upload your database via your team’s website dashboard. • Secure and private platform so you decide who receives your content. NEW REVENUE CHANNEL • Buy your own ad banners to support sponsors and make a profit for your club. • Sell mobile tickets, memberships and merchandise via the Store in your app or website. • Utilise Team Payments to request instant in-app payments from members. • Promote events to maximise attendances to generate greater revenue. PROFESSIONALISM Stack Team App’s features and commercial opportunities will bring an entirely new level of professionalism to any club, no matter how small or large. AUTO-RENEWABLE 12-MONTH SUBSCRIPTION TO REMOVE ADS Stack Team App's innovation and development is funded by mobile advertising, ensuring you and your team can enjoy Stack Team App for free. We take care not to upset or interrupt the user experience. However, if you want to remove the ads from Stack Team App, you can "Remove Ads" via an in-app purchase through the settings of your Stack Team App. It is a 12-month subscription and will auto-renew unless auto-renew is turned off at least 24-hours before the end of the current period - auto-renewal is managed via your iTunes account settings after your purchase. Pricing is USD $2.99 / AUD $4.49 per year, and will be charged to your iTunes Account. PRIVACY POLICY https://teamapp.com/privacy TERMS OF SERVICE https://teamapp.com/terms Bring your club into the mobile age with Stack Team App. Your Team. Your App.
Screenshots
Verdict
The clearest difference is review sentiment: JamTimer at 94% against Stack Team App's 41%. JamTimer also leads on rating (5.0 vs 4.0) and in-app purchases (none vs 1). Stack Team App's advantage is price (Free vs $1.99) and update cadence (every 2 weeks vs every 5 months). On 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
Stack Team App is free to download; JamTimer costs $1.99 up front. Stack Team App sells 1 in-app purchase, starting at $2.99 per year. JamTimer asks for nothing beyond the download.
JamTimer holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Stack Team App has 15K ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 94% of JamTimer's written reviews are positive against 41% of Stack Team App's.
JamTimer ships an update every 5 months, Stack Team App every 2 weeks. The most recent releases landed on October 3, 2026 and October 12, 2026 respectively.
| Parameter | JamTimer | Stack Team App |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 5.0 (9 ratings) — better | 4.0 (15K ratings) |
| Positive reviews | 93.8% of reviews — better | 41.4% of reviews |
| Number of ratings | 9 | 15K — better |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | — | #125 — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 227 MB |
| Age rating | 4+ | 4+ |
| Developer | Fearless Code | Team Mates |
Customer experience
JamTimer
Stack Team App
Bugs and requests
JamTimer
Not enough reviews yet to summarise bugs or requests.
Stack Team App
Reported bugs
5 issues- Notifications not clearing after viewing
- Frequent app crashes and freezes
- Inconsistent behavior when posting messages
- Syncing issues between mobile and web versions
- Unreliable performance and slow load times
Requested features
5 requests- Allow editing of past events and posts
- Improve calendar sync with external calendars
- Add option to disable notifications or customize them
- Enhance photo and video upload capabilities
- Provide more granular access control and permissions
In-app purchases
JamTimer
No in-app purchases
Stack Team App
- Remove Ads$2.991 Year









