Interval Working vs My SISU
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Interval Working
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Interval Working helps you train with more intensity, fewer distractions, and better control. Create workouts for HIIT, Tabata, cardio, circuits, boxing, or fully custom sessions. Set up warm up, work blocks, rest periods, and cool down in one routine. During training, voice cues help you keep going without constantly checking the screen. That makes it easier to stay focused and maintain the right effort. If you use a Bluetooth heart rate sensor, you can also train with heart rate guidance to better control your intensity in every interval. Main features: β’ Build interval workouts in seconds β’ Configure work, rest, warm up, and cool down β’ Follow sessions with voice cues β’ Works with Bluetooth heart rate sensors β’ Great for HIIT, Tabata, cardio, circuits, and boxing β’ Useful for quick workouts or longer sessions Interval Working is built for people who want an interval timer that does more than a basic stopwatch and helps them train in a clearer, faster, and more effective way.
My SISU
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Track, manage, and improve your wellness with smarter solutions SISU Fitness Studio, your ultimate companion for seamless booking experiences and staying active! Streamline your bookings, enhance efficiency and discover a vibrant array of classes and personalized PT sessionsβall at your fingertips
Screenshots
Verdict
The clearest difference is ads: My SISU at none against Interval Working's shown. My SISU also leads on update cadence (every 4 weeks vs every 6 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Interval Working ships an update every 6 months, My SISU every 4 weeks. The most recent releases landed on October 17, 2026 and October 16, 2026 respectively.
| Parameter | Interval Working | My SISU |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 months | Every 4 weeks β better |
| Ads | Yes | No β better |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 15.6 | 15.0 β better |
| Further details β not scored | ||
| Size | 51 MB | 66 MB |
| Age rating | 4+ | 12+ |
| Developer | David Fernandez-Vegue Garcia | Codefish SAL |
In-app purchases
Interval Working
No in-app purchases
My SISU
No in-app purchases









