Intervals Timer vs Keiser M Series
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Intervals Timer
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Intervals is a timer for interval training. It allows timers with many different intervals grouped in "sets". All sets can be repeated and an alert for each interval can be played at the start and at the end. In addition the intervals can have a final countdown.
Keiser M Series
This app collects data from Keiser M Series Intelligent equipment, offering real-time training metrics like power and cadence. It supports free rides, FTP tests, and guided workouts, syncing data to the Keiser Metrics cloud and compatible platforms.
- Real-time training graphs
- Power, cadence, FTP zones
- Free ride mode
- FTP test functionality
- Guided workout sessions
- Workout data syncing
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The Keiser M Series app is a powerful tool for collecting data from Keiser M Series Intelligent equipment. Quickly connect to equipment and begin training with real-time graphs for power, cadence range dials, FTP zones, and W/Kg ratios. Choose to free ride, perform an FTP test, or follow one of the guided sessions designed by Keiser Master Trainers. Sign in with your Keiser Metrics account to sync workout sessions with the Keiser Metrics cloud. Keiser Metrics allows advanced analysis and review of workout sessions. Connect Keiser Metrics to other cloud platforms like Apple Health, Strava, and TrainingPeaks for automatic session syncing! For more information about this app or other Keiser products, please visit our website at https://www.keiser.com.
Screenshots
Verdict
The clearest difference is price: Keiser M Series at Free against Intervals Timer's $4.99. Keiser M Series also leads on update cadence (weekly vs every 2 months) and iOS requirement (13.0 vs 16.0). On 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
Keiser M Series is free to download; Intervals Timer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Intervals Timer ships an update every 2 months, Keiser M Series weekly. The most recent releases landed on September 17, 2026 and October 2, 2026 respectively.
| Parameter | Intervals Timer | Keiser M Series |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | — | 4.3 (2.8K ratings) — better |
| Positive reviews | — | 19.5% of reviews |
| Number of ratings | — | 2.8K — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 77 MB |
| Age rating | 4+ | 12+ |
| Developer | ILIOS Incorporated | Keiser Corp. |
Bugs and requests
Intervals Timer
Not enough reviews yet to summarise bugs or requests.
Keiser M Series
Reported bugs
4 issues- App frequently logs users out
- Inconsistent data recording and syncing
- Compatibility issues with newer devices and iOS versions
- Inability to save user profiles and settings
Requested features
5 requests- Integration with Apple Watch for heart rate data
- Background app functionality
- More customizable workout options
- Better data visualization and progress tracking
- Improved Strava and other app integrations
In-app purchases
Intervals Timer
No in-app purchases
Keiser M Series
No in-app purchases
Questions
Is Intervals Timer free?
Is Keiser M Series free?
Do Intervals Timer or Keiser M Series have ads?
Which is updated more often, Intervals Timer or Keiser M Series?
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