# JamTimer vs Stack Team App

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.

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.

## The numbers

| Metric | JamTimer | Stack Team App |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/jamtimer-for-roller-derby/id435346062/reviews)** | [4.0 (15K ratings)](https://appshunter.io/ios/app/stack-team-app/id625607532/reviews) |
| Number of ratings | 9 | **15K** |
| Positive reviews | **93.8% of reviews** | 41.4% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | — | **#137** |
| Size | 1 MB | 227 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fearless Code](https://appshunter.io/developer/312416741) | [Team Mates](https://appshunter.io/developer/625607535) |

## 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


### Stack Team App

[App page](https://appshunter.io/ios/app/stack-team-app/id625607532)

**Currently charting:** #137 Top Free · Sports (US App Store)

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.

**Highlights:** 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

**Features:** Apple Wallet, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | per year |

**What reviewers like**

- 🚀 Customizable and feature-rich
- 📅 Useful calendar and scheduling features
- 💬 Effective communication and chat tools
- 🏆 Great for managing sports teams and clubs
- 🆓 Free app with good value

**What reviewers complain about**

- 🐛 Buggy notifications and inconsistent behavior
- 📱 Cluttered and confusing user interface
- 💢 Frustrating ad experience, disruptive pop-ups
- 🔍 Difficulty finding and accessing information
- 🔒 Concerns about privacy and security

**Reported bugs**

- 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**

- 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


## Frequently asked questions

### Is JamTimer free?

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

### Is Stack Team App free?

Stack Team App is free to download, with in-app purchases available.

### Which has better reviews, JamTimer or Stack Team App?

JamTimer is rated higher. JamTimer averages 5.0 out of 5 from 9 ratings, while Stack Team App averages 4.0 from 15K ratings.

### Do JamTimer or Stack Team App have ads?

Stack Team App shows ads; JamTimer does not.

### Which is updated more often, JamTimer or Stack Team App?

JamTimer ships an update every 5 months, and Stack Team App every 2 weeks. Most recently, JamTimer was updated on October 3, 2026 and Stack Team App on October 12, 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.*