Comparison

Intervals Pro vs HIIT (Watch) Timer

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

Head to head
About

Intervals Pro

Create and follow custom interval training routines for various fitness activities. This app offers extensive customization for intervals, alerts, and goals, with seamless integration for Apple Watch and Apple Health.

Highlights
  • Highly customizable intervals (time/distance)
  • Spoken interval names and prompts
  • Standalone Apple Watch workouts
  • Workout history with Apple Health
  • Home screen widgets for quick launch
  • Bluetooth heart rate monitor support
  • Siri Shortcuts integration
Features
Read full description

Custom Interval Training at its best for iPhone, Apple Watch and iPad. Featured by Apple and recommended by fitness instructors, personal trainers, marathon runners, and coaches. Let Intervals Pro guide you through any type of interval workout: HIIT, running, strength training, yoga, stretching, circuit training, boxing, MMA, elliptical, rehabilitation, meditation, 7-minute workouts, and many more. FEATURED BY • Apple - App of the Day in 132 Countries • Apple - Workout with Apple Watch, Quick HIIT Workouts • Women's Health Magazine • COACH Magazine • SixColors.com HIGHLIGHTS • Highly Customizable • Home Screen Widgets to quickly launch timers • Spoken interval names and prompts • Customizable alert sounds • Standalone Apple Watch workouts. Leave your iPhone at home! • Workout History using Apple Health data • View an Apple Watch workout live on your iPhone! • Run in the background with the screen locked • Play music or podcasts using the app of your choice • Bluetooth heart rate monitor support for Apple Watch or iPhone • Fill your Activity Rings • Siri Shortcuts • Share timers with friends • Time and Distance Goals • Running Pace and Heart Rate Targets • Auto pause and resume • Send completed workouts to Strava • Confetti! PERSONALIZE YOUR WORKOUT • Customize the Name, Duration, Alert, and Color for each interval • Customize Alert Sounds and Voice Prompts to guide you through your workout • Set a Countdown Alert and vibrations when the interval is about to end • Optional halfway alert • Set target heart rate ranges for each interval • Set time and distance goals FLEXIBLE INTERVAL DURATIONS • Time based (e.g., 45 seconds) • Distance-based (e.g., 0.5 MI or KM) • Count up intervals keep running until your ready for the next interval • Estimated time or distance. Count down time or distance to zero and then continue the interval, counting up until you're ready to move on. THE BEST APPLE WATCH INTERVAL TIMER • Leave your phone at home with our standalone Apple Watch app • Control your music or podcasts on the "Now Playing" screen • View an Apple Watch workout live on your iPhone • Alert Sounds and Voice Prompts to guide you through your workout • Configurable haptic alert countdown that taps you on the wrist when the interval is ending • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Workouts contribute to the Apple Watch Activity Rings WORKOUT HISTORY USING APPLE HEALTH • Intervals Pro has the best Apple Health integration of any interval training app • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Detailed stats for every interval • All your data is safely stored in Apple Health GREAT FOR RUNNING AND CYCLING • Interval duration can be set to either a specified time or distance • Display current pace, pace for the interval, or pace for the entire run • Configure heart rate ranges per interval • Analyze each interval of your run in the workout history MULTIPLE VOICES AND LANGUAGES • Select the language and voice to use for all spoken alerts. • Spoken alerts are localized to 10 languages. Chinese (simplified), Danish, Dutch, French, German, Italian, Norwegian, Polish, Spanish, and Swedish. Get Intervals Pro today, and your workouts will never be the same! SUBSCRIPTION INFO Intervals Pro is free to download and has a free timer. To create multiple timers and unlock all the features of the app, you may choose between a monthly or yearly auto-renewing subscription option. Upon confirmation of the purchase, payment will be charged to your credit card through your iTunes account. Subscription renews automatically unless canceled at least 24 hours before the end of the subscription period. Subscriptions can be managed and auto-renewal turned off in Account Settings in the App Store app. Privacy Policy and Terms of Service: https://intervalspro.com/privacy-policy.html

About

HIIT (Watch) Timer

This app offers a straightforward interval timer designed for Apple Watch, iPhone, and iPad. It features a clean interface, live heart rate monitoring, haptic feedback, and detailed workout summaries, seamlessly integrating with the Health app.

Highlights
  • Apple Watch independent app
  • Live heart rate monitoring
  • Haptic feedback and audio alerts
  • Workout summary with calories and heart rate
  • Health app integration
  • Customizable intervals (warm-up, cooldown, rest)
  • Complications for quick access
Features
Read full description

A simple HIIT app specifically engineered for Apple Watch. It also provides a simple HIIT timer for iPhone/iPad. With easy setup, clean display, live heart rate, haptic feedback, workout summary and completely independent Apple Watch app experience, your interval workouts will undoubtedly be fun. The workout also adds up to the move and exercise rings on Apple Watch. Features: • Super easy setup Digital crown makes setting intervals a breeze. The app remembers your previous settings. • Clean display Large fonts, vivid colors, live heart rate • Workout summary Calories burned, average and max heart rate, total time • Health app integration Workouts are saved to the Health app • Audio alerts and haptic feedback Subtle haptic feedback guiding you through the intervals. You can also set audio beep alerts if you want. • Runs in background A completely independent Apple Watch app experience • Complications They show the time left for the workout. Also, they are a quick way to launch the app. • More settings + Warm up interval + Cooldown interval + Last rest interval + Halfway alert + 8 sec warning during rest + Interval change warning (when 5 seconds are remaining) • Extra A simple HIIT timer for iPhone/iPad * Note: Though this app is primarily designed for Apple Watch, it also provides a simple iPhone/iPad HIIT timer.

Screenshots

Intervals Pro4 screens
HIIT (Watch) Timer3 screens

Verdict

The call

The clearest difference is price: Intervals Pro at Free against HIIT (Watch) Timer's $3.99. Intervals Pro also leads on rating (4.8 vs 4.2) and update cadence (every 8 days vs every 2 months). HIIT (Watch) Timer's advantage is in-app purchases (none vs 8). On review sentiment, ads, device support and iOS requirement 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

Intervals Pro is free to download; HIIT (Watch) Timer costs $3.99 up front. Intervals Pro sells 8 in-app purchases, starting at $2.99 per month. HIIT (Watch) Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Intervals Pro holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Intervals Pro has 14K ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 84% of Intervals Pro's written reviews are positive against 80% of HIIT (Watch) Timer's.

UpkeepUpdate frequency

Intervals Pro ships an update every 8 days, HIIT (Watch) Timer every 2 months. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
Intervals Pro versus HIIT (Watch) Timer: the parameters behind the verdict, then further details
ParameterIntervals ProHIIT (Watch) Timer
PriceFree — better$3.99
Rating4.8 (14K ratings) — better4.2 (12 ratings)
Positive reviews84.4% of reviews — better80.0% of reviews
Number of ratings14K — better12
Update frequencyEvery 8 days — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, Apple Watch
Requires iOS17.516.0 — better
Further details — not scored
Size69 MB44 MB
Age rating4+4+
DeveloperIntervals, LLCRhythmicWorks

Customer experience

Intervals Pro

All ratings13,612 ratings
Positive95.1%
Neutral1.7%
Negative3.2%
Written reviews1,071 reviews
Positive84.4%
Neutral4.9%
Negative10.7%

HIIT (Watch) Timer

All ratings12 ratings
Positive83.3%
Neutral8.3%
Negative8.3%
Written reviews10 reviews
Positive80.0%
Neutral10.0%
Negative10.0%

Bugs and requests

Intervals Pro

Reported bugs

2 issues
  • Workout data not syncing correctly
  • App crashes or freezes on certain devices

Requested features

3 requests
  • More customization options for interval displays
  • Ability to batch delete or manage workout history
  • Integration with more third-party fitness apps

HIIT (Watch) Timer

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

Intervals Pro

Subscriptions2
  • Monthly Membership7 Days trial$2.991 Month
  • Yearly Membership7 Days trial$19.991 Year
One-time6
  • Generous Tip$0.99
  • Awesome Tip$1.99
  • Massive Tip$4.99
Show 3 more
  • Amazing Tip$9.99
  • Intervals Pro (Legacy)$69.99
  • Lifetime Access$69.99
None

HIIT (Watch) Timer

No in-app purchases

Questions

Is Intervals Pro free?
Intervals Pro is free to download, with in-app purchases available.
Is HIIT (Watch) Timer free?
HIIT (Watch) Timer costs $3.99, with no in-app purchases.
Which has better reviews, Intervals Pro or HIIT (Watch) Timer?
Intervals Pro is rated higher. Intervals Pro averages 4.8 out of 5 from 14K ratings, while HIIT (Watch) Timer averages 4.2 from 12 ratings.
Do Intervals Pro or HIIT (Watch) Timer have ads?
Neither Intervals Pro nor HIIT (Watch) Timer shows ads.
Which is updated more often, Intervals Pro or HIIT (Watch) Timer?
Intervals Pro ships an update every 8 days, and HIIT (Watch) Timer every 2 months. Most recently, Intervals Pro was updated on September 24, 2026 and HIIT (Watch) Timer on September 21, 2026.

Other comparisons