Comparison

Interval Working vs My SISU

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Interval Working

Features
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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.

About

My SISU

Features
Read full description

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 sessionsβ€”all at your fingertips

Screenshots

Interval Working4 screens
My SISU4 screens

Verdict

The call

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences Β· 4 level
Interval Working versus My SISU: the parameters behind the verdict, then further details
ParameterInterval WorkingMy SISU
PriceFreeFree
Update frequencyEvery 6 monthsEvery 4 weeks β€” better
AdsYesNo β€” better
In-app purchasesNoNo
DevicesiPhone, iPodiPhone, iPod
Requires iOS15.615.0 β€” better
Further details β€” not scored
Size51 MB66 MB
Age rating4+12+
DeveloperDavid Fernandez-Vegue GarciaCodefish SAL

In-app purchases

None

Interval Working

No in-app purchases

None

My SISU

No in-app purchases

Questions

Is Interval Working free?
Interval Working is free to download, with no in-app purchases.
Is My SISU free?
My SISU is free to download, with no in-app purchases.
Do Interval Working or My SISU have ads?
Interval Working shows ads; My SISU does not.
Which is updated more often, Interval Working or My SISU?
Interval Working ships an update every 6 months, and My SISU every 4 weeks. Most recently, Interval Working was updated on October 17, 2026 and My SISU on October 16, 2026.

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