SmartHIIT vs RoundShift
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SmartHIIT
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Quick workouts at home: 10 to 30 minutes, no equipment, guided from start to finish. One workout makes the week count. A PLAN THAT FITS YOUR ROUTINE Choose your goal, experience, time per workout and how many days a week you want to train. SmartHIIT builds a four-week plan of bodyweight circuits that gets a little harder every week and adapts to your feedback: too hard, and the next session eases off; too easy, and it moves ahead. When a phase ends, a new one starts with new exercises. A FULL-SCREEN 3D COACH See every move in large size while you train, with a timer you can read even with your phone on the floor. Switch the camera between front, angled and side whenever you like. During rests the video already shows the next exercise, and the coach's voice tells you what's next. CONSISTENCY YOU CAN SEE The Today screen shows your week, your next workout and how many weeks in a row you've trained. Track workouts, active minutes and estimated calories. Take the 1-minute fitness check to see your progress. Connect Apple Health to save your workouts there. FOR BUSY DAYS Sessions from 10 to 30 minutes, a no-jumping option, a short version, reminders at the time you choose and a widget with your next session. FREE INTERVAL TIMER Tabata, 30/30, 40/20, 45/15 and more, with voice and beeps, even with the screen locked or your music playing. Free, always. TRY IT FIRST Your first plan session is free, no subscription needed, with the full-screen coach included. SMARTHIIT PRO Pro unlocks the full plan and its next phases, the full-screen coach in every workout, the full library of workouts and 3D exercises, the routine editor and the AI tools. Monthly and annual subscriptions include the same features. Prices, billing periods and eligible introductory offers are shown before purchase. The annual plan is billed for the full year at once. Subscriptions renew automatically unless canceled at least 24 hours before the end of the period. Manage or cancel them in your Apple Account subscriptions. Your history, saved routines and the free timer remain available after a subscription ends. Calories are estimates. SmartHIIT does not assess injuries or replace individual professional advice. Watch the moves, warm up at your own pace and stop if you feel pain or discomfort. Privacy: https://smarthiit.dltechdigital.com/privacy/ Terms: https://smarthiit.dltechdigital.com/terms.html
RoundShift
This interval timer app provides voice coaching for various workout types, allowing you to keep your eyes on your exercise rather than the screen. It offers customizable presets, multiple voice options, and can even display workouts on a larger screen for group sessions. Advanced features like adaptive rest and Apple Health integration are available with a Pro upgrade.
- Voice coaching for workouts
- Customizable interval presets
- Plain language workout builder
- Multi-language coach voices
- Screen-off and face-down operation
- AirPlay for group sessions
- Adaptive rest with Apple Watch
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The interval timer you don't have to look at. RoundShift calls out every round — get ready, work, rest, half way, last round — so your eyes stay on the workout, not the screen. BUILT IN SECONDS • Tabata, HIIT, EMOM, strength presets — or design your own • Warm-up, custom intervals, unlimited rounds • Describe a workout in plain words and let RoundShift build it VOICE THAT COACHES • Real coach voices in 10 languages — or calm and hype styles • 89 exercise names spoken aloud in custom workouts • Works with the screen off, phone face down, music playing COACH MODE ON THE BIG SCREEN • AirPlay the countdown to any TV for group sessions and classes • Giant display the whole room can read APPLE WATCH + ADAPTIVE REST (PRO) • Full timer on your wrist with live heart rate • Rest that adapts: end rest early when your heart rate recovers, or extend it when you need more • Workouts logged to Apple Health with the right activity type SEE YOURSELF SHOW UP • Streaks, weekly minutes, and a calendar of every session • Home Screen widgets and quick actions NOT JUST FOR THE GYM • Box breathing and breathwork: 4-4-4-4 in seconds • Stretch and physio holds with spoken changeovers • Focus sprints for study and deep work • Anything that repeats: intervals are intervals RoundShift is free forever for running timers and built-in workouts. RoundShift Pro (one-time purchase, no subscription) unlocks saved workouts, stats, widgets, and Apple Watch.
Screenshots
Verdict
The clearest difference is update cadence: RoundShift at every 2 days against SmartHIIT's every 4 days. RoundShift also leads on device support (4 vs 1) and iOS requirement (15.0 vs 18.5). On price, ads and in-app purchases 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
Both are free to download. SmartHIIT sells 2 in-app purchases, starting at $4.99 per month and RoundShift sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
SmartHIIT ships an update every 4 days, RoundShift every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | SmartHIIT | RoundShift |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 days | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod, Apple Watch — better |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 33 MB | 143 MB |
| Age rating | 4+ | 4+ |
| Developer | Diego Dias de Macedo | Carl Law |
In-app purchases
SmartHIIT
- SmartHIIT Pro Monthly7 Days trial$4.991 Month
- SmartHIIT Pro Annual7 Days trial$34.991 Year
RoundShift
- Intervo Pro (Lifetime)$4.99









