Comparison

AmpHIIT vs Interval Timer by STRNTH

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

Head to head
About

AmpHIIT

Features
Read full description

AmpHIIT is a simple, focused HIIT and Tabata interval timer built for fast workouts, circuit training, cardio sessions, and at-home exercise. Set your prepare, work, and rest times, choose the number of exercises, and let AmpHIIT guide your workout with clear visual phases, optional voice coaching, and countdown beeps. Whether you are doing Tabata rounds, bodyweight circuits, cardio intervals, stretching routines, or quick daily workouts, AmpHIIT keeps the timing easy so you can focus on moving. Features: • Custom prepare, work, and rest timers • Adjustable number of exercises • Clear workout phase display • Optional voice coaching • Optional countdown beeps • Clean, distraction-free interface • Simon Says workout mode • Screen-awake support during active workouts • Local settings saved on your device • No account required • No ads • No tracking • Optional Tip Jar using Apple In-App Purchase AmpHIIT is designed to be lightweight, private, and easy to use. There are no accounts, no subscriptions, no ads, and no third-party analytics. Your workout settings stay on your device. AmpHIIT is a fitness timer, not medical advice. Exercise within your limits and consult a qualified professional before starting a new workout program.

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

AmpHIIT4 screens
Interval Timer by STRNTH4 screens

Verdict

The call

The clearest difference is ads: AmpHIIT at none against Interval Timer by STRNTH's shown. Interval Timer by STRNTH's advantage is device support (4 vs 1) and iOS requirement (15.1 vs 17.6). On price and in-app purchases 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. AmpHIIT sells 3 one-off in-app purchases and Interval Timer by STRNTH sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard3 real differences · 3 level
AmpHIIT versus Interval Timer by STRNTH: the parameters behind the verdict, then further details
ParameterAmpHIITInterval Timer by STRNTH
PriceFreeFree
Update frequency—Every 10 days
AdsNo — betterYes
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, iPod, Apple Watch — better
Requires iOS17.615.1 — better
Further details — not scored
Size7 MB55 MB
Age rating4+12+
DeveloperSteven MayerNext Big Leap Ltd

In-app purchases

3 purchases

AmpHIIT

One-time3
  • AmpHIIT$0.99
  • AmpHIIT$1.99
  • AmpHIIT$3.99
1 purchases

Interval Timer by STRNTH

One-time1
  • Remove ads$9.99

Questions

Is AmpHIIT free?
AmpHIIT 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 AmpHIIT or Interval Timer by STRNTH have ads?
Interval Timer by STRNTH shows ads; AmpHIIT does not.

Other comparisons