Seconds Interval Timer vs HIIT (Watch) Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Seconds Interval Timer
This app provides a versatile interval timer for various workout types like Tabata, HIIT, and circuit training. It features a clear, full-screen display, customizable alerts, and background operation. Users can also utilize a stopwatch and countdown timer, with integration for Apple Health.
- Full-screen colored display
- Templates for HIIT, Tabata, Circuit Training
- Voice and audio alerts
- Music assignment per interval
- Background operation
- Apple Health integration
- Stopwatch and countdown timer
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Seconds is an interval timer for HIIT, Tabata, EMOM, circuits and any workout built from timed intervals. It calls each interval out loud, keeps running with the screen off, and runs on iPhone, iPad and Apple Watch. Apple has featured it, and Joe Wicks, The Body Coach, has said it is the fitness app he uses more than any other. BUILD ANY WORKOUT - Start from a HIIT, Tabata or circuit template, or build a timer from scratch with sets, rounds and intervals of different lengths. - Chain timers into one compound timer, so a warm-up flows into the main set and then a cool-down. - Color-code every interval so you know what is coming before the beep. - Share a timer with a friend in one tap. HEAR IT, DON'T WATCH IT - Voice cues call out each interval by name and warn you before the next one starts. - Beeps and bells are there too if you would rather not be talked at. - Play your own music, per timer or per interval. Cues duck the music and it comes back up when they are done. - The timer keeps going in the background while you use other apps or the screen sleeps. ON THE GYM FLOOR - A full-screen, color-coded display you can read from across the room, in portrait or landscape. On iPad it uses the whole screen. - A lock button stops a stray tap from pausing your set. APPLE WATCH - Seconds runs on the watch by itself, so the phone can stay in the locker. Timers you build on the phone sync to the wrist, and Quick Intervals builds a basic circuit on the watch itself. MORE TIMERS - A stopwatch that marks your best and worst laps. - A countdown timer with five preset durations (three on Apple Watch). APPLE HEALTH - Save workouts and mindful sessions to Health. With a heart rate monitor connected, Seconds reads your body measurements and year of birth from Health to estimate calories burned. FREE TO TRY, ONE PAYMENT TO UNLOCK - Everything is available from the first launch. Build any timer and run it. - Each timer locks after you run it once. A single in-app purchase removes the lock on every timer you make. SECONDS AND SECONDS PRO - Seconds Pro is the same app, paid once up front, with nothing to unlock. The two are separate products and a purchase in one does not carry over to the other. If you bought Seconds Pro, download Seconds Pro. If you bought the unlock in Seconds, download Seconds and use Restore Purchases.
HIIT (Watch) Timer
This app offers a straightforward interval timer designed for Apple Watch, iPhone, and iPad. It features a clean interface, live heart rate monitoring, haptic feedback, and detailed workout summaries, seamlessly integrating with the Health app.
- Apple Watch independent app
- Live heart rate monitoring
- Haptic feedback and audio alerts
- Workout summary with calories and heart rate
- Health app integration
- Customizable intervals (warm-up, cooldown, rest)
- Complications for quick access
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A simple HIIT app specifically engineered for Apple Watch. It also provides a simple HIIT timer for iPhone/iPad. With easy setup, clean display, live heart rate, haptic feedback, workout summary and completely independent Apple Watch app experience, your interval workouts will undoubtedly be fun. The workout also adds up to the move and exercise rings on Apple Watch. Features: • Super easy setup Digital crown makes setting intervals a breeze. The app remembers your previous settings. • Clean display Large fonts, vivid colors, live heart rate • Workout summary Calories burned, average and max heart rate, total time • Health app integration Workouts are saved to the Health app • Audio alerts and haptic feedback Subtle haptic feedback guiding you through the intervals. You can also set audio beep alerts if you want. • Runs in background A completely independent Apple Watch app experience • Complications They show the time left for the workout. Also, they are a quick way to launch the app. • More settings + Warm up interval + Cooldown interval + Last rest interval + Halfway alert + 8 sec warning during rest + Interval change warning (when 5 seconds are remaining) • Extra A simple HIIT timer for iPhone/iPad * Note: Though this app is primarily designed for Apple Watch, it also provides a simple iPhone/iPad HIIT timer.
Screenshots
Verdict
The clearest difference is price: Seconds Interval Timer at Free against HIIT (Watch) Timer's $3.99. Seconds Interval Timer also leads on rating (4.7 vs 4.2) and ratings volume (24K vs 12). HIIT (Watch) Timer's advantage is in-app purchases (none vs 1) and iOS requirement (16.0 vs 18.0). On review sentiment, ads 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
Seconds Interval Timer is free to download; HIIT (Watch) Timer costs $3.99 up front. Seconds Interval Timer sells 1 one-off in-app purchase. HIIT (Watch) Timer asks for nothing beyond the download.
Seconds Interval Timer holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 12, so its average is the more settled of the two. Written reviews complicate that: 75% of Seconds Interval Timer's written reviews are positive against 80% of HIIT (Watch) Timer's, so the app with the better star average is not the one people write more warmly about.
Seconds Interval Timer ships an update monthly, HIIT (Watch) Timer every 2 months. The most recent releases landed on September 25, 2026 and September 21, 2026 respectively.
| Parameter | Seconds Interval Timer | HIIT (Watch) Timer |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | 4.7 (24K ratings) — better | 4.2 (12 ratings) |
| Positive reviews | 75.0% of reviews | 80.0% of reviews — better |
| Number of ratings | 24K — better | 12 |
| Update frequency | Monthly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 95 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Runloop Ltd | RhythmicWorks |
Customer experience
Seconds Interval Timer
HIIT (Watch) Timer
Bugs and requests
Seconds Interval Timer
Reported bugs
2 issues- Timer sometimes stops working unexpectedly
- Issues with restoring purchases on new devices
Requested features
5 requests- Ability to change beep/alert volume independently
- Option to delay transition between intervals
- Sync workouts across devices
- More preset workout templates
- Heart rate monitoring integration
HIIT (Watch) Timer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Seconds Interval Timer
- Advanced Version$7.99
HIIT (Watch) Timer
No in-app purchases
Questions
Is Seconds Interval Timer free?
Is HIIT (Watch) Timer free?
Which has better reviews, Seconds Interval Timer or HIIT (Watch) Timer?
Do Seconds Interval Timer or HIIT (Watch) Timer have ads?
Which is updated more often, Seconds Interval Timer or HIIT (Watch) Timer?
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