Comparison

Intervals Pro vs Gustav Workout 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

Gustav Workout Timer

This app helps you manage your workout intervals for various training types like HIIT, circuits, and strength. It offers customizable timers, built-in options, and personalized interval naming for a focused and comfortable training experience.

Highlights
  • Customizable intervals up to 10 minutes
  • Ready-made built-in timers
  • Save custom timers to Favourites
  • Custom interval naming
  • New sound and audio cue options
  • Haptic feedback for interval changes
  • Modern Liquid Glass design
Features
Read full description

Gustav Workout Timer – your interval timer for HIIT, Tabata, CrossFit, circuit training, and all workout types. Fast, clean, and more convenient than ever. Perfect for HIIT workouts, cardio training, strength training, yoga, and circuit training – all your interval exercise needs. What you'll find in the app: - Customizable intervals: set up to 10 intervals with durations up to 10 minutes, including countdown before your first interval starts. - Built-in timers: pre-made workout timers ready to use instantly without setup. - Favorites: save your custom timers and easily share them with your team. - Personal naming: name each interval according to your workout. - New sounds + audio alerts: choose what signals the end of each interval. - Haptic feedback: gentle haptic response so you stay informed without looking at the screen. - Liquid Glass design: modern, clean aesthetic with new transitions and depth. - New animations: smoother and more engaging workout experience. - Various backgrounds: choose from preset backgrounds or use your own. - Improved user experience: more intuitive keyboard handling, better portrait mode display, and additional optimizations. Whether you're pushing hard through short intervals or going at a steady pace, this app helps you keep the rhythm and focus on your technique.

Screenshots

Intervals Pro4 screens
Gustav Workout Timer4 screens

Verdict

The call

The clearest difference is rating: Intervals Pro at 4.8 against Gustav Workout Timer's 4.1. Intervals Pro also leads on ratings volume (14K vs 8) and update cadence (every 8 days vs monthly). Gustav Workout Timer's advantage is in-app purchases (none vs 8) and review sentiment (100% vs 84%). On price, 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

Both are free to download. Intervals Pro sells 8 in-app purchases, starting at $2.99 per month. Gustav Workout Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Intervals Pro holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Intervals Pro has 14K ratings behind it against 8, so its average is the more settled of the two. Written reviews complicate that: 84% of Intervals Pro's written reviews are positive against 100% of Gustav Workout Timer's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Intervals Pro ships an update every 8 days, Gustav Workout Timer monthly. Both last shipped on October 1, 2026.

Scorecard6 real differences · 4 level
Intervals Pro versus Gustav Workout Timer: the parameters behind the verdict, then further details
ParameterIntervals ProGustav Workout Timer
PriceFreeFree
Rating4.8 (14K ratings) — better4.1 (8 ratings)
Positive reviews84.4% of reviews100.0% of reviews — better
Number of ratings14K — better8
Update frequencyEvery 8 days — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.5 — better18.0
Further details — not scored
Size69 MB31 MB
Age rating4+4+
DeveloperIntervals, LLCDalibor Janecek

Customer experience

Intervals Pro

All ratings13,612 ratings
Positive95.1%
Neutral1.7%
Negative3.2%
Written reviews1,072 reviews
Positive84.4%
Neutral4.9%
Negative10.7%

Gustav Workout Timer

All ratings8 ratings
Positive87.5%
Neutral0.0%
Negative12.5%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Gustav Workout 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

Gustav Workout Timer

No in-app purchases

Questions

Is Intervals Pro free?
Intervals Pro is free to download, with in-app purchases available.
Is Gustav Workout Timer free?
Gustav Workout Timer is free to download, with no in-app purchases.
Which has better reviews, Intervals Pro or Gustav Workout Timer?
Intervals Pro is rated higher. Intervals Pro averages 4.8 out of 5 from 14K ratings, while Gustav Workout Timer averages 4.1 from 8 ratings.
Do Intervals Pro or Gustav Workout Timer have ads?
Neither Intervals Pro nor Gustav Workout Timer shows ads.
Which is updated more often, Intervals Pro or Gustav Workout Timer?
Intervals Pro ships an update every 8 days, and Gustav Workout Timer monthly. Most recently, Intervals Pro was updated on October 1, 2026 and Gustav Workout Timer on October 1, 2026.

Other comparisons