Comparison

Seconds Interval Timer vs Circuit Training Timer Lite

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

Circuit Training Timer Lite

This app coaches your workouts with customizable timers, allowing you to focus on training. It supports location tracking for detailed statistics and heart rate monitoring with Bluetooth LE devices. Voice coaching and clear visual cues keep you informed without needing to check your screen.

Highlights
  • Customizable interval timers
  • Location tracking for stats
  • Bluetooth LE heart rate monitor support
  • Voice coaching and notifications
  • Workout history tracking
  • iCloud synchronization
Features
Read full description

Let our timer to coach your workouts so you can focus on actual training without staring at the watch. This timer meets the needs of amateurs as well as professionals. It was designed to be flexible and highly customisable so it can be used for all kinds of trainings. There is one important difference between this app and other apps on the App Store. No need to change timer configuration when switching exercises all the time. Create and configure timers once and use them multiple times. For more demanding users timers can be composed into entire workouts. All timers and workouts can be categorized into groups. For each timer can be enabled location tracking. With enabled location tracking you can seethe route and location based statistics like distance, speed, pace and altitude. Another great feature is support for heart rate training using a Bluetooth LE heart rate monitor. User can create multiple profiles and switch between them. Heart rate training profile contains all settings for your training like heart rate zones and notification options. During exercising user can be notified about current heart rate and zone. One heart rate zone can be selected as target zone. Voice coaching can notify the user to adjust tempo to stay in current zone. The user interface is designed to be clear and readable from a distance. For notification can be used vibrations, sounds and also text to speech voice. No more looking at the screen to know the current interval. Each timer is composed from intervals. Each interval has a configurable name, duration, color and music. Music can be set also for whole timer. Your workout sessions can be saved into history where you can see how you performed during exercising. All your timers and workout history can be synchronized into iCloud. Features: - Support for Apple Health (only for Full Version) - Synchronization to iCloud (only for Full Version) - Heart rate training feature. - Location tracking feature. - Timer sounds: last seconds, every second, interval end, timer finish and metronome. - Timer vibrations: last seconds, interval end and timer finish. - Timer text to speech voice: interval name, next interval name, duration at beginning of interval, current interval time, counting down for last seconds and timer finish. - Timers can be easily shared and duplicated. - Timers can be categorised into groups. - Timer music (playlist, album or song). - Multiple screens for running timer with different stats: Map, Location, Heart Rate, Timer, Intervals and Music - User can configure visual style for timer screens. - Screens for running timer can be locked. - Each interval has configurable duration, name, color and music. - Runs and plays music on background. - Universal app, works on iPhone and iPad. - Max interval duration is 99 hours 59 minutes and 59 seconds. - Max number of sets is 999. Free version includes ads and other restrictions that can be removed with InApp Purchases. If you have enable Track Location option please note: Continued use of GPS running in the background can dramatically decrease battery life.

Screenshots

Seconds Interval Timer4 screens
Circuit Training Timer Lite4 screens

Verdict

The call

The clearest difference is ratings volume: Seconds Interval Timer at 24K against Circuit Training Timer Lite's 468. Circuit Training Timer Lite's advantage is review sentiment (85% vs 75%) and iOS requirement (12.0 vs 18.0). On price, rating, update cadence and ads 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 and Circuit Training Timer Lite sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Seconds Interval Timer against 4.8 for Circuit Training Timer Lite. That said, the two scores are not equally well evidenced: Seconds Interval Timer has 24K ratings behind it against 468, so its average is the more settled of the two. Written reviews are what separate them: 75% of Seconds Interval Timer's written reviews are positive against 85% of Circuit Training Timer Lite's.

UpkeepUpdate frequency

Seconds Interval Timer ships an update monthly, Circuit Training Timer Lite every 6 weeks. The most recent releases landed on October 13, 2026 and October 7, 2026 respectively.

Scorecard3 real differences · 7 level
Seconds Interval Timer versus Circuit Training Timer Lite: the parameters behind the verdict, then further details
ParameterSeconds Interval TimerCircuit Training Timer Lite
PriceFreeFree
Rating4.7 (24K ratings)4.8 (468 ratings) — better
Positive reviews74.6% of reviews84.6% of reviews — better
Number of ratings24K — better468
Update frequencyMonthly — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.012.0 — better
Further details — not scored
Size95 MB36 MB
Age rating4+4+
DeveloperRunloop LtdDenciSoft s.r.o.

Customer experience

Seconds Interval Timer

All ratings23,711 ratings
Positive93.0%
Neutral1.9%
Negative5.2%
Written reviews1,268 reviews
Positive74.6%
Neutral6.4%
Negative19.0%

Circuit Training Timer Lite

All ratings468 ratings
Positive97.0%
Neutral1.1%
Negative1.9%
Written reviews78 reviews
Positive84.6%
Neutral5.1%
Negative10.3%

User reviews

Seconds Interval Timer

From 24K App Store ratings

What we love

  • 🚀 Great workout app
  • 👍 Customizable and user-friendly
  • 🔒 Reliable and stable
  • 💡 Versatile for various workouts
  • 👍 Easy to create and edit timers

Room to improve

  • 🐛 Occasional audio issues
  • 🔍 Limited Apple Watch integration
  • 💰 Paid version required for full functionality
  • 🕰️ Time-consuming to set up complex workouts

Circuit Training Timer Lite

From 468 App Store ratings

What we love

  • 👍 Highly customizable workouts
  • 🎶 Music integration
  • ⏱️ Flexible timer settings
  • 🔊 Voice prompts for exercises
  • 📚 Saved workout routines

Room to improve

  • 🔋 Battery drain issues
  • 🔒 Limited functionality in free version
  • 🔇 Quiet audio prompts
  • 📈 Lack of workout history/progress tracking

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

Circuit Training Timer Lite

Reported bugs

2 issues
  • Playlist sync issues
  • App crashes when phone is locked

Requested features

4 requests
  • Ability to share workout routines
  • Integration with fitness tracking apps
  • More advanced statistics and analytics
  • Apple Watch app support

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
3 purchases

Circuit Training Timer Lite

One-time3
  • Remove Ads$1.99
  • Unlimited Timers$1.99
  • Full Version$2.99

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is Circuit Training Timer Lite free?
Circuit Training Timer Lite is free to download, with in-app purchases available.
Which has better reviews, Seconds Interval Timer or Circuit Training Timer Lite?
Circuit Training Timer Lite is rated higher. Seconds Interval Timer averages 4.7 out of 5 from 24K ratings, while Circuit Training Timer Lite averages 4.8 from 468 ratings.
Do Seconds Interval Timer or Circuit Training Timer Lite have ads?
Neither Seconds Interval Timer nor Circuit Training Timer Lite shows ads.
Which is updated more often, Seconds Interval Timer or Circuit Training Timer Lite?
Seconds Interval Timer ships an update monthly, and Circuit Training Timer Lite every 6 weeks. Most recently, Seconds Interval Timer was updated on October 13, 2026 and Circuit Training Timer Lite on October 7, 2026.

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