Comparison

Seconds Interval Timer vs HIIT Timer

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

Head to head
About

Seconds Interval Timer

This interval timer app helps you build and run custom workouts for HIIT, Tabata, and circuits. It provides voice cues, runs in the background, and syncs with Apple Watch. Save workouts to Apple Health and track calories burned.

Highlights
  • Build custom timers for any workout
  • Voice cues for intervals
  • Runs in background with screen off
  • Syncs with Apple Watch
  • Color-coded interval display
  • Save workouts to Apple Health
  • Play music with cues
Features
Read full description

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.

About

HIIT Timer

This interval training app provides voice-guided workouts for Tabata, EMOM, Circuit, and custom routines. It allows users to focus on their exercises without constantly checking their screen, with features like saved workouts and workout history.

Highlights
  • Voice announcements for workout cues
  • Multiple training modes (Tabata, EMOM, Circuit, Custom)
  • Save and replay custom workouts
  • Workout history tracking
  • Independent sound, haptic, and voice controls
  • Music integration with voice cues
Features
Read full description

HIIT Timer is a fast, focused interval timer for people who want to train, not fiddle with settings. Pick a mode, hit start, and let the app call out every work and rest period so you can keep your eyes off the screen and on the set. FOUR WAYS TO TRAIN Tabata. Classic high intensity intervals with ready made protocols. EMOM. Every minute on the minute. Name your exercises, do your reps, rest whatever time is left. Circuit. Set your stations, work time, rest time, and rounds, then go. Custom. Build your own workout from scratch. Name every exercise, set work and rest for each one, reorder them, and choose your rounds. BUILT FOR REAL WORKOUTS • Voice announcements call out each exercise, so you never look at your phone mid set • Type your times directly, or tap to adjust, whichever is faster • Save any workout and start it again in one tap • History tracks completed workouts, total minutes, and exercises done • Sound, haptics, and voice each turn on or off independently • Your music keeps playing, cues mix over the top • Screen stays awake through a workout • Optional pause when you leave the app • Dark mode COMPLETELY FREE No ads. No subscriptions. No paid unlocks. No account to create. Every feature is there the moment you install. YOUR DATA STAYS YOURS HIIT Timer collects nothing. Your workouts, history, and settings live on your device and nowhere else.

Screenshots

Seconds Interval Timer4 screens
HIIT Timer4 screens

Verdict

The call

The clearest difference is rating: Seconds Interval Timer at 4.7 against HIIT Timer's 3.5. Seconds Interval Timer also leads on ratings volume (24K vs 2). HIIT Timer's advantage is in-app purchases (none vs 1) and review sentiment (100% vs 74%). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Seconds Interval Timer sells 1 one-off in-app purchase. HIIT Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Seconds Interval Timer holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 74% of Seconds Interval Timer's written reviews are positive against 100% of HIIT Timer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Seconds Interval Timer ships an update monthly, HIIT Timer fortnightly. The most recent releases landed on November 14, 2026 and November 13, 2026 respectively.

Scorecard7 real differences · 3 level
Seconds Interval Timer versus HIIT Timer: the parameters behind the verdict, then further details
ParameterSeconds Interval TimerHIIT Timer
PriceFreeFree
Rating4.7 (24K ratings) — better3.5 (2 ratings)
Positive reviews74.5% of reviews100.0% of reviews — better
Number of ratings24K — better2
Update frequencyMonthlyFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size99 MB37 MB
Age rating4+4+
DeveloperRunloop LtdANNR Studio

Customer experience

Seconds Interval Timer

All ratings23,780 ratings
Positive92.9%
Neutral1.9%
Negative5.2%
Written reviews1,289 reviews
Positive74.5%
Neutral6.4%
Negative19.1%

HIIT Timer

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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 Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
None

HIIT Timer

No in-app purchases

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is HIIT Timer free?
HIIT Timer is free to download, with no in-app purchases.
Which has better reviews, Seconds Interval Timer or HIIT Timer?
Seconds Interval Timer is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while HIIT Timer averages 3.5 from 2 ratings.
Do Seconds Interval Timer or HIIT Timer have ads?
Neither Seconds Interval Timer nor HIIT Timer shows ads.
Which is updated more often, Seconds Interval Timer or HIIT Timer?
Seconds Interval Timer ships an update monthly, and HIIT Timer fortnightly. Most recently, Seconds Interval Timer was updated on November 14, 2026 and HIIT Timer on November 13, 2026.

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