Comparison

Seconds Pro 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 Pro Interval Timer

This interval timer app is designed for high-intensity interval training (HIIT), Tabata, and circuit training workouts. It features a large, color-coded display, customizable interval names, and background operation. It also integrates with Apple Health to track your fitness data.

Highlights
  • Full screen colored display
  • Templates for HIIT, Tabata, Circuit Training
  • Speaks interval names and provides warnings
  • Assign music per interval
  • Runs in background
  • Share interval timers
  • Apple Health integration
Features
Read full description

Seconds Pro 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 Pro 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 Pro reads your body measurements and year of birth from Health to estimate calories burned. PAID ONCE, NOTHING TO UNLOCK - Seconds Pro is paid for up front. Every feature is included and every timer you make can be run as many times as you like. SECONDS AND SECONDS PRO - Seconds is the free version of this app. It has the same features, but each timer locks after one run until a single in-app purchase unlocks it. 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 Pro Interval Timer4 screens
Circuit Training Timer Lite4 screens

Verdict

The call

The clearest difference is price: Circuit Training Timer Lite at Free against Seconds Pro Interval Timer's $7.99. Circuit Training Timer Lite also leads on iOS requirement (12.0 vs 18.0). Seconds Pro Interval Timer's advantage is in-app purchases (none vs 3) and ratings volume (12K vs 468). On rating, 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

CostPrice · In-app purchases · Ads · Monetization

Circuit Training Timer Lite is free to download; Seconds Pro Interval Timer costs $7.99 up front. Circuit Training Timer Lite sells 3 one-off in-app purchases. Seconds Pro Interval Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for Seconds Pro Interval Timer against 4.8 for Circuit Training Timer Lite. That said, the two scores are not equally well evidenced: Seconds Pro Interval Timer has 12K ratings behind it against 468, so its average is the more settled of the two. Written reviews are what separate them: 80% of Seconds Pro Interval Timer's written reviews are positive against 85% of Circuit Training Timer Lite's.

UpkeepUpdate frequency

Seconds Pro Interval Timer ships an update fortnightly, Circuit Training Timer Lite every 6 weeks. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

Scorecard7 real differences · 4 level
Seconds Pro Interval Timer versus Circuit Training Timer Lite: the parameters behind the verdict, then further details
ParameterSeconds Pro Interval TimerCircuit Training Timer Lite
Price$7.99Free — better
Rating4.8 (12K ratings)4.8 (468 ratings)
Positive reviews79.7% of reviews84.6% of reviews — better
Number of ratings12K — better468
Update frequencyFortnightly — betterEvery 6 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#8 — better—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.012.0 — better
Further details — not scored
Size94 MB36 MB
Age rating4+4+
DeveloperRunloop LtdDenciSoft s.r.o.

Customer experience

Seconds Pro Interval Timer

All ratings12,104 ratings
Positive94.7%
Neutral1.9%
Negative3.4%
Written reviews1,520 reviews
Positive79.7%
Neutral6.0%
Negative14.3%

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 Pro Interval Timer

From 12K App Store ratings

What we love

  • ⭐ Great updates
  • 🤖 Amazing voice prompts
  • 👍 Easy to use
  • 🎨 Highly customizable
  • 🔧 Versatile for various workouts

Room to improve

  • 🐛 Occasional bugs and glitches
  • 🔌 Music volume issues
  • 🔍 Complicated setup for some features
  • 🌐 Sync/sharing issues between devices
  • 🔇 Inconsistent audio cues

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 Pro Interval Timer

Reported bugs

4 issues
  • Intervals randomly pausing or skipping
  • Music volume issues when launching the app
  • Inconsistent audio cues and countdown
  • Sync issues between devices

Requested features

6 requests
  • Ability to lock Apple Watch screen
  • Option to see more than just the next exercise
  • Fractional time settings (e.g. 7.74 seconds)
  • More voice/audio customization options
  • Improved sync between iPhone and iPad
Show 1 more
  • Calendar integration to track workouts

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

None

Seconds Pro Interval Timer

No in-app purchases

3 purchases

Circuit Training Timer Lite

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

Questions

Is Seconds Pro Interval Timer free?
Seconds Pro Interval Timer costs $7.99, with no in-app purchases.
Is Circuit Training Timer Lite free?
Circuit Training Timer Lite is free to download, with in-app purchases available.
Which has better reviews, Seconds Pro Interval Timer or Circuit Training Timer Lite?
Seconds Pro Interval Timer and Circuit Training Timer Lite are both rated 4.8 out of 5 on the App Store, from 12K and 468 ratings respectively.
Do Seconds Pro Interval Timer or Circuit Training Timer Lite have ads?
Neither Seconds Pro Interval Timer nor Circuit Training Timer Lite shows ads.
Which is updated more often, Seconds Pro Interval Timer or Circuit Training Timer Lite?
Seconds Pro Interval Timer ships an update fortnightly, and Circuit Training Timer Lite every 6 weeks. Most recently, Seconds Pro Interval Timer was updated on October 12, 2026 and Circuit Training Timer Lite on October 7, 2026.

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