Comparison

Seconds Interval Timer vs Simple Circuit Interval 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 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

Simple Circuit Interval Timer

This app provides customizable interval timers for HIIT, circuit training, and yoga. It also features a daily plank challenge to build core strength at home without equipment. Enjoy stunning visuals and offline workout capabilities.

Highlights
  • Customizable interval timers
  • HIIT, circuit, and Tabata support
  • Daily plank challenge
  • Offline workout capability
  • Customizable themes and layouts
  • REP meter for pace tracking
Features
Read full description

Working from home? Need some exercise? Simple Circuit Interval Timer is an easy-to-use fitness interval timer app for your High Intensity Interval Training (HIIT timer) workouts and yoga practises. Now also includes PLANK CHALLENGE APP- a daily challenge to encourage working out at home with one of the best core strengthening and fitness activities available, with no gym equipment needed! Customize intervals to suit your needs. PLANK A DAY Daily Planking Challenge - are you down? Join the challenge - plank for up to 1 minute, every hour, every day Fun and easy home workout Lots of variations to try Set your own workout schedule and times Play with family and friends, or by yourself Helpful and fun reminders (but you can totally turn them off) Customized workouts Plank Challenge is for beginners and pros alike Healthy lifestyle benefits and results! High Intensity Interval Training Timer for all sports and activities Lots of people use circuit training for weight loss and strength training Regular circuit, HIIT, and Tabata intervals AMRAP and Supersets Hold yin yoga and pilates poses Cardio (spinning, running) intervals and Calisthenics For use at home and in the gym Plank and core training exercises Push-ups and pull-ups Boxing rounds WOD and x-fit 7 Minute workouts (and longer!) Meditation and breathing Great for working out at home and exercises without equipment Fitness Features Set number of sets, and repeating interval timers for circuits and rest periods REP meter to help to maintain your pace Colorful, customizable themes Helpful countdowns in and out of each circuit Workout offline, anywhere Stunning visuals Awesome color themes DARK MODE GLOW UP MODE for a little razzle-dazzle Mesmerizing animations Circular or Squircular layouts Big and clear interfaces Simple, intuitive menus PRO MODE Unlock PRO MODE to access all themes, colors, layouts and features forever Be the first to get access to new features Maximize your workout with this free fitness interval timer. Keep that heart pumping! BENEFITS OF PLANKING Planking is one of *the top exercises* that anyone can do, anywhere, anytime! Planking challenges every one of your major muscle groups and has dozens of benefits. Ab definition and core strength - including obliques (side abs) Overall strength and full body fitness and strength Improved posture Greater flexibility and balance Body weight training of any kind improves weight lifting performance, improves cardiovascular health Relief from back pain and muscle tension Decrease risk of back injuries Improved metabolism Feel happier with exercise Great results for toned abs, butts, arms and legs Take a break from work and exercise while working from home with the PLANK CHALLENGES APP

Screenshots

Seconds Interval Timer4 screens
Simple Circuit Interval Timer4 screens

Verdict

The call

The clearest difference is review sentiment: Simple Circuit Interval Timer at 100% against Seconds Interval Timer's 75%. Simple Circuit Interval Timer also leads on update cadence (every 5 days vs monthly) and iOS requirement (10.0 vs 18.0). On price, ads, in-app purchases and monetization model 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 Simple Circuit Interval Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Seconds Interval Timer ships an update monthly, Simple Circuit Interval Timer every 5 days. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
Seconds Interval Timer versus Simple Circuit Interval Timer: the parameters behind the verdict, then further details
ParameterSeconds Interval TimerSimple Circuit Interval Timer
PriceFreeFree
Rating4.7 (24K ratings) — better—
Positive reviews74.6% of reviews100.0% of reviews — better
Number of ratings24K — better—
Update frequencyMonthlyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.010.0 — better
Further details — not scored
Size95 MB113 MB
Age rating4+4+
DeveloperRunloop LtdTimothy Shepherd

Customer experience

Seconds Interval Timer

All ratings23,711 ratings
Positive93.0%
Neutral1.9%
Negative5.2%
Written reviews1,272 reviews
Positive74.6%
Neutral6.4%
Negative19.0%

Simple Circuit Interval Timer

Written reviews2 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

Simple Circuit Interval Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Seconds Interval Timer

One-time1
  • Advanced Version$7.99
1 purchases

Simple Circuit Interval Timer

One-time1
  • Simple Circuit Trainer: Pro2 variants$1.99

Questions

Is Seconds Interval Timer free?
Seconds Interval Timer is free to download, with in-app purchases available.
Is Simple Circuit Interval Timer free?
Simple Circuit Interval Timer is free to download, with in-app purchases available.
Do Seconds Interval Timer or Simple Circuit Interval Timer have ads?
Neither Seconds Interval Timer nor Simple Circuit Interval Timer shows ads.
Which is updated more often, Seconds Interval Timer or Simple Circuit Interval Timer?
Seconds Interval Timer ships an update monthly, and Simple Circuit Interval Timer every 5 days. Most recently, Seconds Interval Timer was updated on October 17, 2026 and Simple Circuit Interval Timer on October 4, 2026.

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