Comparison

Gym Timer vs HIIT Timer / Interval Timer

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

Head to head
About

Gym Timer

This app helps you track gym sessions and manage rest times between sets. It's designed for use on a smartwatch, allowing you to leave your phone behind. The app alerts you when it's time to train again, ensuring your workout flows smoothly.

Highlights
  • Track gym sessions
  • Time rest periods between sets
  • Smartwatch optimized
  • Phone-free gym experience
  • Alerts for training intervals
  • HealthKit integration
Features
Read full description

Gym Timer helps you tracking your gym sessions and timing rest time. - You can leave your smartphone in the locker room: An app designed from the concept of the Apple Watch's app to give you the best mobility in the gym, without the need to lug around the smartphone. It's all on your wrist. With CareKit and HealthKit integration, your workout will never be interrupted if your Apple Watch goes into standby mode. - It does everything: With Gym Timer, you just set the number of sets and the rest time between one set and the other, then you just need to start the timer at the end of each set. When is time to start to train again, it will alert you. Follow us on our social media to be the first to know about new features we're developing, to get in touch with our community and give us a feedback. Facebook: https://www.facebook.com/gymtimer/ Instagram: @gym_timer Twitter: @gym_timer Gym Timer uses Health Kit for some functionalities like staying active while your watch screen is off.

About

HIIT Timer / Interval Timer

This app provides a customizable timer for high-intensity interval training. Easily set up warm-up, workout, and cool-down periods with adjustable intervals and counts. Personalize colors, sounds, and notifications for a tailored experience.

Highlights
  • Unlimited timer creation
  • Customizable intervals (warm-up, workout, cool-down)
  • Adjustable counts
  • Color and sound customization
  • Dark mode support
  • Background notifications
Features
Read full description

It's a timer app suitable for HIIT training. All features are completely free to use. Features: - Quick start-up and comfortable operability. Create unlimited timers. - Freely set warm-up, ready, workout, interval, cool-down minutes / seconds, and set counts. - Customize colors, texts, background notifications, sounds, speeches, vibrations, screen flashes and icon badges. - Dark mode - All free URL scheme: hiittimer:// --- * High-intensity interval training High-intensity interval training (HIIT) is a training protocol alternating short periods of intense or explosive anaerobic exercise with brief recovery periods until the point of exhaustion, which thereby relies on "the anaerobic energy releasing system almost maximally." * Procedure HIIT exercise sessions generally consist of a warm up period followed by repetitions of high-intensity exercises separated by medium intensity exercises for recovery, then a cool-down period. The high-intensity exercise should be done at near maximum intensity. The medium exercise should be about 50% intensity. The number of repetitions and length of each depends on the exercise, but maybe as little as three repetitions with just 20 seconds of intense exercise. The specific exercises performed during the high-intensity portions vary. Most of the research on HIIT has been done using a cycling ergometer, but other exercises like a rowing ergometer, running, stair climbing and uphill walking can also be effective. There is no specific formula for HIIT. Depending on one's level of cardiovascular development, the moderate-level intensity can be as slow as walking. A common formula involves a 2:1 ratio of work to recovery periods, for example, 30–40 seconds of hard sprinting alternated with 15–20 seconds of jogging or walking, repeated to failure. The entire HIIT session may last between four and thirty minutes, meaning that it is considered to be an excellent way to maximize a workout limited by time constraints. Use of a clock or timer is recommended to keep accurate times, the number of rounds, and intensity. Quoted from: https://en.wikipedia.org/wiki/High-intensity_interval_training

Screenshots

Gym Timer4 screens
HIIT Timer / Interval Timer4 screens

Verdict

The call

The clearest difference is ads: Gym Timer at none against HIIT Timer / Interval Timer's shown. Gym Timer also leads on ratings volume (460 vs 14) and update cadence (every 3 weeks vs every 2 months). HIIT Timer / Interval Timer's advantage is rating (4.9 vs 4.5). On price, in-app purchases 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

HIIT Timer / Interval Timer holds the better App Store score, 4.9 against 4.5. That said, the two scores are not equally well evidenced: Gym Timer has 460 ratings behind it against 14, so its average is the more settled of the two.

UpkeepUpdate frequency

Gym Timer ships an update every 3 weeks, HIIT Timer / Interval Timer every 2 months. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.

Scorecard6 real differences · 4 level
Gym Timer versus HIIT Timer / Interval Timer: the parameters behind the verdict, then further details
ParameterGym TimerHIIT Timer / Interval Timer
PriceFreeFree
Rating4.5 (460 ratings)4.9 (14 ratings) — better
Positive reviews55.0% of reviews—
Number of ratings460 — better14
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS13.0 — better26.0
Further details — not scored
Size19 MB12 MB
Age rating4+4+
DeveloperGiuseppe FasanoFugaPiyo Inc.

Customer experience

Gym Timer

All ratings460 ratings
Positive86.1%
Neutral4.6%
Negative9.3%
Written reviews238 reviews
Positive55.0%
Neutral10.5%
Negative34.5%

HIIT Timer / Interval Timer

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Gym Timer

Reported bugs

4 issues
  • Timer resets unexpectedly
  • Set/rep count not updating correctly
  • Syncing issues with Apple Watch
  • Notifications not working as expected

Requested features

4 requests
  • Add option to track exercise time
  • Implement workout history/progress tracking
  • Provide Apple Watch complications
  • Offer paid ad-free version

HIIT Timer / Interval Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Gym Timer

No in-app purchases

None

HIIT Timer / Interval Timer

No in-app purchases

Questions

Is Gym Timer free?
Gym Timer is free to download, with no in-app purchases.
Is HIIT Timer / Interval Timer free?
HIIT Timer / Interval Timer is free to download, with no in-app purchases.
Which has better reviews, Gym Timer or HIIT Timer / Interval Timer?
HIIT Timer / Interval Timer is rated higher. Gym Timer averages 4.5 out of 5 from 460 ratings, while HIIT Timer / Interval Timer averages 4.9 from 14 ratings.
Do Gym Timer or HIIT Timer / Interval Timer have ads?
HIIT Timer / Interval Timer shows ads; Gym Timer does not.
Which is updated more often, Gym Timer or HIIT Timer / Interval Timer?
Gym Timer ships an update every 3 weeks, and HIIT Timer / Interval Timer every 2 months. Most recently, Gym Timer was updated on September 20, 2026 and HIIT Timer / Interval Timer on September 17, 2026.

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