Comparison

Beat Watcher vs Interval Flow

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

Head to head
About

Beat Watcher

This app monitors your heart rate and alerts you with sound and vibration when it goes above or below custom thresholds. It integrates with the Health app and offers background monitoring for continuous tracking, useful for stress management, breathing exercises, and conditions like POTS.

Highlights
  • Customizable heart rate thresholds
  • Audible and haptic alerts
  • Background monitoring
  • POTS and ME/CFS symptom tracking
  • Integration with Health app
  • Bluetooth chest strap support
Features
Read full description

Beat Watcher helps you stay aware of your heart rate on Apple Watch with customizable high and low BPM threshold alerts. Beat Watcher integrates with the Health app to read your heart rate. Use Beat Watcher for: - listening to your body during daily routines - stress awareness and breathing exercises - meditation and mindfulness - workouts and pacing - sleep or rest check-ins - staying aware of high or low heart rate readings Some users with POTS or ME/CFS use Beat Watcher as part of their own pacing and body-awareness routines. Beat Watcher is not a medical device and does not diagnose, treat, prevent, or manage any condition. Turn the Digital Crown on Apple Watch to set the desired BPM threshold. Then, you will hear a sound and feel a vibration when your heart rate goes above the threshold, and a different sound and vibration when your heart rate goes back below the level you set. Enable Low Alerts in Settings to also get notified when your heart rate drops below a second threshold you set. Stay aware of high and low heart rate readings at the same time. Get fewer alerts with Range Mode. Beat Watcher alerts once above your High threshold, then once below your Low threshold, and stays quiet between those crossings. After the Low alert, the cycle starts again. Install the free Beat Watcher companion app on your iPhone to receive phone alerts when your heart rate crosses a threshold. Turn on Critical Alerts to hear a loud sound even when your phone is on silent or Do Not Disturb, so you or someone nearby can notice the alert during sleep. The iPhone companion also keeps a local Alert History so you can review saved alerts, add a note and preset context tags, and export saved history as a CSV file. Full-access users can invite trusted contacts with Alert Sharing. Contacts can accept invites, receive shared High and Low alert notifications, set their preferences, and view shared history for free. Each person controls High and Low separately; a notification is sent only when both enable that alert type. Alert Sharing is not an emergency or medical alert service. Optionally turn on Background Mode to continue getting haptic and audible feedback in response to your heart rate after you drop your wrist or leave the app. Enable the Persistent Alerts setting to continue getting haptic and audible feedback every two seconds while your heart rate remains above or below your set thresholds. Or, if you just want a continuous heart rate display without the haptic and audible feedback, you can turn Alerts off entirely. Beat Watcher also works with Bluetooth chest straps, such as the Polar H10, paired with Apple Watch. This can improve Watch battery life and lets you hear alerts or view heart rate on the Watch while it charges. Note: Background Mode will not work at the same time as a Workout started in another app. For example, if you start Background Mode in Beat Watcher and then start an Outdoor Run Workout in the built-in Workouts app, Beat Watcher will not continue to run in the background. SUBSCRIPTION Beat Watcher is free to download. Heart rate alerts, Background Mode, creating invites, sending shared alerts, and other premium features require full access through the annual subscription, its 1-month free trial, a one-time Lifetime Access purchase, or a grandfathered purchase. Trusted contacts can accept, receive, manage, and review shared alerts for free. After the free trial, the annual subscription renews automatically unless canceled at least 24 hours before the end of the current period. Manage or cancel it in your device’s Settings under your Apple ID. If you purchased Beat Watcher before the subscription transition, you keep full access to all features. No subscription required. Privacy Policy and Terms of Service: https://beatwatcher.app/terms Requires an Apple Watch running watchOS 9 or later.

About

Interval Flow

This app revolutionizes fitness routines with deep customization and advanced tracking for various activities like HIIT, Yoga, and CrossFit. It allows users to create, share, and follow personalized workouts with features like color-coded intervals, real-time progress tracking, and voice assistance.

Highlights
  • Color-coded intervals
  • Customizable circuits
  • Real-time progress tracking
  • Voice assist and search
  • Exercise library
  • Workout sharing
Features
Read full description

Interval Flow: Experience a Workout Revolution Interval Flow is your ultimate fitness companion, designed to transform your workout experience with deep customization and advanced tracking. This versatile app is perfect for a wide range of activities including HIIT, TABATA, CrossFit, Yoga, Pilates, Meditation, and more. With Interval Flow, you can stay focused on your fitness goals while the app handles the details. Key Features: - Color-Coded Intervals: Customize your workout visually with color-coded intervals. Set distinct colors for warm-ups, high-intensity bursts, rest periods, and more, to easily navigate through your routine. - Exercise Library: Build your workouts with ease! Add new exercises or select from the existing ones to tailor your workout to your specific needs. - Real-Time Progress Tracking: Keep a live tab on your workout progress. The dynamic interval list updates in real-time, ensuring you know exactly where you are in your routine. - Customizable Circuits: Create the perfect workout sequence by arranging various exercises into repeatable circuits tailored to your fitness level and goals. - Personalized Interval Warnings: Get timely alerts before an interval ends. Customize the warning sounds to suit your style, ensuring smooth transitions without missing a beat. - Interactive Workflow: Enjoy crafting your workouts with a user-friendly interface that’s as intuitive as it is functional. Setting up your ideal workout regime is now as engaging as the workout itself. - Voice Assist: Let our advanced voice assist guide you through your exercises, announcing what’s next so you can remain focused on your form and intensity. - Voice Search: Quickly find your favorite workouts using voice commands, making your preparation seamless and hands-free. - AirShare: Share your custom workouts with friends or clients effortlessly using AirDrop, enhancing connectivity and interaction. Why Choose Interval Flow? With Interval Flow, you don't just exercise, you experience a revolution in workout efficiency and enjoyment. The app’s intuitive interface and comprehensive customization options make it the optimal companion for anyone serious about fitness. Whether you're powering through a high-intensity session or seeking tranquility in yoga, Interval Flow adapts to your pace and preference. Unlock your potential with Interval Flow – where your workout meets innovation. Interval Flow Subscription: The app includes a 1 month long auto-renewable subscription with a 3-day free trial, which will unlock premium features, like unlimited workouts, timer program editing and autoplay and costs $4.99/ month. It will be charged to your credit card through your iTunes account and will automatically renew unless you canceled at least 24 hours before the end of the current period. Any unused portion of a free trial period will be forfeited when you purchase the subscription. Though your subscription for the current month cannot be canceled, you can turn auto-renewal off in your account settings after purchase. See the instructions here: https://support.apple.com/en-us/HT202039 You can read the terms of use and privacy policy here: https://kapi90.github.io/hiit_timer_privacy_policy.html End User License Agreement (EULA) of the App Store applies: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Beat Watcher4 screens
Interval Flow4 screens

Verdict

The call

The clearest difference is review sentiment: Beat Watcher at 86% against Interval Flow's 48%. Beat Watcher also leads on monetization model (freemium vs subscription) and iOS requirement (15.2 vs 18.6). Interval Flow's advantage is rating (4.7 vs 4.5). On price, ratings volume, update cadence and ads 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. Beat Watcher sells 2 in-app purchases, starting at $24.00 per year and Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Interval Flow holds the better App Store score, 4.7 against 4.5. Both are backed by a comparable volume of ratings — 87 and 167 respectively. Written reviews complicate that: 86% of Beat Watcher's written reviews are positive against 48% of Interval Flow's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Beat Watcher ships an update weekly, Interval Flow fortnightly. The most recent releases landed on October 29, 2026 and October 23, 2026 respectively.

Scorecard4 real differences · 6 level
Beat Watcher versus Interval Flow: the parameters behind the verdict, then further details
ParameterBeat WatcherInterval Flow
PriceFreeFree
Rating4.5 (87 ratings)4.7 (167 ratings) — better
Positive reviews86.4% of reviews — better48.1% of reviews
Number of ratings87167 — better
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium — betterSubscription
DevicesiPhone, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.2 — better18.6
Further details — not scored
Size47 MB20 MB
Age rating4+4+
DeveloperGanotis Holdings, Inc.Bence Kaposzta

Customer experience

Beat Watcher

All ratings85 ratings
Positive85.9%
Neutral5.9%
Negative8.2%
Written reviews44 reviews
Positive86.4%
Neutral2.3%
Negative11.4%

Interval Flow

All ratings168 ratings
Positive93.5%
Neutral2.4%
Negative4.2%
Written reviews27 reviews
Positive48.1%
Neutral18.5%
Negative33.3%

Bugs and requests

Beat Watcher

Not enough reviews yet to summarise bugs or requests.

Interval Flow

Reported bugs

10 issues
  • Programs deleted after update
  • App crashes when adding a program
  • Show/Hide Instructions adds time to interval
  • App defaults to unused workout
  • Cannot permanently skip to end of timed activity
Show 5 more
  • Intervals revert to previous settings
  • App won't remember order of custom circuit interval programs
  • Blank screen after download
  • Cannot get program to open
  • Cannot see bottom of screen on questionnaire

Requested features

5 requests
  • Increase repetitions to 20
  • Streamline adding intervals
  • Make it possible to hide unused workouts
  • Add music integration or option
  • Provide visual instructions for moves

In-app purchases

2 purchases

Beat Watcher

Subscriptions1
  • Annual Access1 Month trial$24.001 Year
One-time1
  • Lifetime Access$50.00
10 purchases

Interval Flow

Subscriptions8
  • 3 Month$4.993 Months
  • 1 Month$9.991 Month
  • 1 Month, 3 day trial3 Days trial$9.991 Month
Show 5 more
  • Annual7 Days trial$14.991 Year
  • 1 Year discounted$25.951 Year
  • 1 Year, 3 day trial3 Days trial$39.991 Year
  • 1 Year$39.991 Year
  • 1 Year Intro month1 Month trial$39.991 Year
One-time2
  • Free Lifetime subscriptionFree
  • Lifetime$24.99

Questions

Is Beat Watcher free?
Beat Watcher is free to download, with in-app purchases available.
Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Which has better reviews, Beat Watcher or Interval Flow?
Interval Flow is rated higher. Beat Watcher averages 4.5 out of 5 from 87 ratings, while Interval Flow averages 4.7 from 167 ratings.
Do Beat Watcher or Interval Flow have ads?
Neither Beat Watcher nor Interval Flow shows ads.
Which is updated more often, Beat Watcher or Interval Flow?
Beat Watcher ships an update weekly, and Interval Flow fortnightly. Most recently, Beat Watcher was updated on October 29, 2026 and Interval Flow on October 23, 2026.

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