Comparison

Interval Timer vs Interval Timer by STRNTH

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

Head to head
About

Interval Timer

Features
Read full description

Your ultimate workout companion for HIIT, Tabata, circuit training, and any interval-based workout. Designed to be simple, powerful, and distraction-free โ€” so you can focus on your training, not your phone. Set up your workout in seconds. Customize every detail of your interval timer with just a few taps: set your Work and Rest durations, number of Exercises, Rounds, and Round Reset time. The app instantly calculates your total workout time so you always know what you're getting into. Stay focused while you train. A bold, full-screen countdown with a circular progress ring keeps you on track. Always know which phase you're in โ€” Work or Rest โ€” along with your current exercise, round, and total time remaining. Audio cues alert you to every transition so you never have to glance at the screen. Track your consistency. The built-in Workout History tracks your Total Workouts, Total Time, and current Streak. A color-coded calendar lets you see your training days at a glance, and tapping any date reveals a detailed breakdown of every session โ€” including work/rest intervals, exercises, and rounds. Build the habit. Watch your streak grow day by day. Nothing beats seeing a wall of green on your calendar. Why you'll love it: - Clean, intuitive dark-themed interface - Fully customizable Work, Rest, Rounds, Exercises & Round Reset - Large, glanceable timer with circular progress indicator - Audio cues for seamless hands-free transitions - Pause, resume & skip controls mid-workout - Workout history with calendar view & daily streaks This app offers subscription plans. If you choose to subscribe, your payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current billing period. You can manage or cancel your subscription at any time in your App Store account settings. https://sites.google.com/view/polyhootprivacypolicy/privacy-policy https://sites.google.com/view/polyhootprivacypolicy/Terms

About

Interval Timer by STRNTH

Features
Read full description

Interval Timer by STRNTH is a free interval timer for HIIT, Tabata, EMOM, AMRAP, boxing rounds, running intervals, stretching and more. Build any timer you want with no fixed structure, then run it hands-free and read it from across the room. BUILD ANY TIMER - Add as many steps as you like, each with its own label, duration, colour, sound and voice. - Group steps into repeat blocks so a round loops as many times as you need. - Link separate timers together to chain a warm-up, workout and cool-down into one session. - Start from a template: Couch to 5K, Tabata, HIIT, 7 minute workout, EMOM, AMRAP, boxing rounds, Pomodoro, box breathing and full body stretch. RUN IT HANDS-FREE - A giant readout inside a progress ring, sized to read from across the gym. - Full-screen colour per step so you know your phase at a glance. - Voice reads each step and announces what is next before it arrives. - Sound cues on the last three seconds, plus beep, go, switch, rest, bell, horn, gong and whistle tones. Import your own sounds too. - Optional spoken 3-2-1 countdown, a cadence metronome from 60 to 180 BPM and haptic feedback. - Choose what the screen shows: interval time, total time, interval count, the clock or heart rate. MORE TOOLS - A countdown tab with quick presets for a fast single timer. - A stopwatch with laps that highlight your fastest and slowest split. - Light and dark themes and your own custom step colours. - Share a timer as a link or a file, and import timers others send you. ACROSS YOUR DEVICES - An Apple Watch companion runs your timers on the wrist with colour and haptics. - Pair a Bluetooth heart rate strap to see live BPM, zones and more while you train. - Save finished sessions to Apple Health as workouts. - Back up your timers to your private iCloud. FREE, WITH A ONE-TIME UPGRADE Interval Timer is free and supported by ads. A single 9.99 purchase removes ads for good. No accounts, no subscriptions, no cloud sign-in. Your timers stay on your device. Part of the STRNTH family of training apps.

Screenshots

Interval Timer4 screens
Interval Timer by STRNTH4 screens

Verdict

The call

The clearest difference is ads: Interval Timer at none against Interval Timer by STRNTH's shown. Interval Timer also leads on update cadence (every 2 days vs every 10 days) and iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Interval Timer sells 2 in-app purchases, starting at $1.99 per month and Interval Timer by STRNTH sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Interval Timer ships an update every 2 days, Interval Timer by STRNTH every 10 days. The most recent releases landed on September 21, 2026 and September 18, 2026 respectively.

Scorecard3 real differences ยท 3 level
Interval Timer versus Interval Timer by STRNTH: the parameters behind the verdict, then further details
ParameterInterval TimerInterval Timer by STRNTH
PriceFreeFree
Update frequencyEvery 2 days โ€” betterEvery 10 days
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch โ€” better
Requires iOS13.0 โ€” better15.1
Further details โ€” not scored
Size55 MB55 MB
Age rating4+12+
DeveloperPratik KhomaneNext Big Leap Ltd

In-app purchases

2 purchases

Interval Timer

Subscriptions1
  • PRO ACCESS$1.991 Month
One-time1
  • Lifetime Access$12.99
1 purchases

Interval Timer by STRNTH

One-time1
  • Remove ads$9.99

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Interval Timer by STRNTH free?
Interval Timer by STRNTH is free to download, with in-app purchases available.
Do Interval Timer or Interval Timer by STRNTH have ads?
Interval Timer by STRNTH shows ads; Interval Timer does not.
Which is updated more often, Interval Timer or Interval Timer by STRNTH?
Interval Timer ships an update every 2 days, and Interval Timer by STRNTH every 10 days. Most recently, Interval Timer was updated on September 21, 2026 and Interval Timer by STRNTH on September 18, 2026.

Other comparisons