Comparison

WatchFit vs Subintervals

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

Head to head
About

WatchFit

Create and schedule custom workouts directly on your Apple Watch. Tailor intervals, warm-ups, and cool-downs with time or distance-based steps. Receive real-time alerts for pace and heart rate to optimize your training.

Highlights
  • Custom workout creation
  • Apple Watch integration
  • Interval and phase customization
  • Time and distance-based steps
  • Heart rate and pace alerts
  • Calendar integration
  • No account required
Features
Read full description

WatchFit is the ultimate fitness workout companion designed specifically for Apple Watch users who want to take their exercise routines to the next level. This app empowers you to create custom structured workouts tailored to your exact needs and seamlessly integrates them into the native Workout app on your Apple Watch, offering a smooth and personalized training experience. With WatchFit, building your perfect workout schedule has never been easier. You can customize every element of your training with detailed control over warmup, cooldown, and interval phases. Whether your workout steps are based on time or distance, WatchFit supports them all. For endurance sports such as running and cycling, it even offers distance-based step options, enhancing your precision and control in each session. You can plan your fitness routine ahead of time and watch as scheduled workouts automatically sync to your Apple Watch. Once added, these customized workouts appear right on the Workout app on your Apple Watch's home screen, ready to be started at the perfect moment, helping you stay accountable and motivated. One of the standout features of WatchFit is its advanced heart rate monitor integration and in-workout alert system. You can set up pace or heart rate alerts that notify you if you stray above or below your target zones during exercise. This real-time feedback keeps you in your ideal training intensity, ensuring every workout is optimized for maximum benefit. Managing your weekly fitness workout schedule is streamlined through an intuitive interface that lets you view your upcoming workouts, track completed sessions, and identify any missed ones. This visibility promotes consistency and helps reinforce your training habits. Plus, with calendar integration, your scheduled workouts are automatically added to your calendar app, so you never accidentally skip an important session. Privacy and security are paramount in WatchFit’s design. Unlike many fitness apps, WatchFit requires no account setup, and purchases are handled anonymously. Your custom workouts sync securely to your iCloud account, ensuring your data stays private and intact even if you switch devices or reinstall the app. WatchFit doesn’t gather user analytics or access personal workout data beyond verifying if workouts were completed, giving you full confidence in your privacy. Whether you're a seasoned athlete or just starting your fitness journey, WatchFit equips you with the tools to create personalized workouts that match your unique goals. By adding your workouts directly to the Apple Watch native Workout app, you reduce distractions and streamline your fitness experience, allowing you to focus fully on performance and progress. With its user-friendly scheduling, structured workout routines, heart rate alerts, and seamless Apple Watch integration, WatchFit is much more than a simple fitness workout app—it’s an intelligent fitness partner that supports your active lifestyle with precision and privacy. Maximize your training, stay committed to your goals, and enjoy the empowerment of having all your workouts perfectly organized on your Apple Watch home screen. Note: For the best experience, WatchFit is optimized for Apple Watch devices running watchOS 10 or later, paired with an iPhone. Terms & Conditions: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://sites.google.com/view/watchfit-privacy-policy"

About

Subintervals

Visualize your training data with detailed displays and interactive graphs. Customize your analysis and sync seamlessly with intervals.icu for up-to-the-minute insights into activities, events, and performance metrics.

Highlights
  • Detailed activity and event visualization
  • Interactive performance graphs
  • Seamless intervals.icu sync
  • Customizable data analysis
  • Actionable training insights
Features
Read full description

Elevate Your Training with Subintervals Subintervals transforms your intervals.icu data into actionable insights. This app brings your training activities, events, and performance metrics to life through detailed displays and interactive graphs. Customise and control your data for a tailored analysis, and seamlessly sync with intervals.icu for up-to-the-minute information. Key Features: - Detailed visualisation of activities and events. - Dynamic, interactive graphs for performance tracking. - Effortless sync with intervals.icu. Please note that it is an independent application developed by an enthusiast keen on providing a complementary tool to the official platform.

Screenshots

WatchFit4 screens
Subintervals4 screens

Verdict

The call

WatchFit and Subintervals both sit at 4.9 stars, but that hides the real split: 100% of Subintervals's written reviews are positive against 82% of WatchFit's. Subintervals also leads on update cadence (weekly vs every 3 weeks). WatchFit's advantage is ratings volume (34 vs 2). On price, rating, ads 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. WatchFit sells 5 in-app purchases, starting at $1.99 per month and Subintervals sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for WatchFit against 5.0 for Subintervals. That said, the two scores are not equally well evidenced: WatchFit has 34 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 82% of WatchFit's written reviews are positive against 100% of Subintervals's.

UpkeepUpdate frequency

WatchFit ships an update every 3 weeks, Subintervals weekly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
WatchFit versus Subintervals: the parameters behind the verdict, then further details
ParameterWatchFitSubintervals
PriceFreeFree
Rating4.9 (34 ratings)5.0 (2 ratings) — better
Positive reviews81.8% of reviews100.0% of reviews — better
Number of ratings34 — better2
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.016.4 — better
Further details — not scored
Size17 MB109 MB
Age rating4+4+
DeveloperMathieu SavariaInaki Arroyo Nebreda

Customer experience

WatchFit

All ratings34 ratings
Positive97.1%
Neutral2.9%
Negative0.0%
Written reviews11 reviews
Positive81.8%
Neutral9.1%
Negative9.1%

Subintervals

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

WatchFit

Subscriptions2
  • WatchFit Premium$1.991 Month
  • WatchFit Premium3 Days trial$9.991 Year
One-time3
  • WatchFit Premium (Special)Free
  • WatchFit Premium (Sale)$9.99
  • WatchFit Premium (Lifetime)$19.99
4 purchases

Subintervals

One-time4
  • Coffee$3.99
  • Lunch$11.99
  • Big Thanks$17.99
Show 1 more
  • Sponsor$44.99

Questions

Is WatchFit free?
WatchFit is free to download, with in-app purchases available.
Is Subintervals free?
Subintervals is free to download, with in-app purchases available.
Which has better reviews, WatchFit or Subintervals?
Subintervals is rated higher. WatchFit averages 4.9 out of 5 from 34 ratings, while Subintervals averages 5.0 from 2 ratings.
Do WatchFit or Subintervals have ads?
Neither WatchFit nor Subintervals shows ads.
Which is updated more often, WatchFit or Subintervals?
WatchFit ships an update every 3 weeks, and Subintervals weekly. Most recently, WatchFit was updated on October 25, 2026 and Subintervals on October 24, 2026.

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