Comparison

Seconds Interval Timer vs Intervals

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 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.

Highlights
  • 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
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

Intervals

Design custom interval training routines for high-intensity workouts. This free timer app offers large, clear visuals and audible cues for seamless transitions between exercises. It's ideal for home or outdoor fitness sessions, including Tabata and yoga.

Highlights
  • Custom interval workout creation
  • Large font and contrasting colors
  • Audible interval transition cues
  • Supports Tabata and yoga workouts
  • No account or personal data required
  • Offline workout storage
Features
Read full description

Use HIIT Builder Lite as a free interval timer to manage your High Intensity Interval Training to maximize your fitness. Create custom interval workouts to energize your personal training. The workout is stored on your device. There is no need to create an account. We don’t ask for any personal health data. HIIT Builder Lite is a great interval training app for home workouts or workouts at the park. You can create Tabata workouts or any HIIT workout of your choice. The ability to customize any interval workout to your needs allows you to take control of your fitness using HIIT Builder Lite as an interval timer for high intensity interval training. HIIT Builder Lite can also be used for custom yoga and other custom movement workouts. HIIT Builder Lite uses large fonts and contrasting colors to make it easy to see where you are in an exercise in your interval workout. Interval transitions are easy to see on the user interface. The app also rings bells when switching from one workout interval to the next workout interval. Each interval workout can be completely customized. You can have each exercise interval be the same length or you can modify each interval’s length to get exactly what you need from the exercise. Create as many interval workouts as you want. Download HIIT Builder Lite for a free interval timer. Thoughts, concerns, suggestions? We're always trying to improve. Please email us at info@hiitbuilderapp.com

Screenshots

Seconds Interval Timer4 screens
Intervals4 screens

Verdict

The call

The clearest difference is in-app purchases: Intervals at none against Seconds Interval Timer's 1. Intervals also leads on rating (5.0 vs 4.7) and iOS requirement (12.1 vs 18.0). Seconds Interval Timer's advantage is ads (none vs shown) and ratings volume (24K vs 1). On price 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. Intervals asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Intervals holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Seconds Interval Timer ships an update monthly, Intervals every 4 months. The most recent releases landed on October 18, 2026 and October 2, 2026 respectively.

Scorecard7 real differences · 3 level
Seconds Interval Timer versus Intervals: the parameters behind the verdict, then further details
ParameterSeconds Interval TimerIntervals
PriceFreeFree
Rating4.7 (24K ratings)5.0 (1 ratings) — better
Positive reviews74.5% of reviews—
Number of ratings24K — better1
Update frequencyMonthly — betterEvery 4 months
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.012.1 — better
Further details — not scored
Size95 MB15 MB
Age rating4+12+
DeveloperRunloop LtdCurtis Wichern

Customer experience

Seconds Interval Timer

All ratings23,711 ratings
Positive93.0%
Neutral1.9%
Negative5.2%
Written reviews1,277 reviews
Positive74.5%
Neutral6.3%
Negative19.2%

Intervals

All ratings1 ratings
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

Intervals

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
None

Intervals

No in-app purchases

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is Intervals free?
Intervals is free to download, with no in-app purchases.
Which has better reviews, Seconds Interval Timer or Intervals?
Intervals is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while Intervals averages 5.0 from 1 ratings.
Do Seconds Interval Timer or Intervals have ads?
Intervals shows ads; Seconds Interval Timer does not.
Which is updated more often, Seconds Interval Timer or Intervals?
Seconds Interval Timer ships an update monthly, and Intervals every 4 months. Most recently, Seconds Interval Timer was updated on October 18, 2026 and Intervals on October 2, 2026.

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