Rhythm SYNC. vs Heart Brain Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rhythm SYNC.
This app connects to heart rate monitors to display real-time data, manage activity modes, and track workout history. It allows for software updates and integrates with HealthKit for saving workout data.
- Connects to Rhythm 24 and Rhythm+ monitors
- Manages activity modes and biometrics
- Displays heart rate and battery level
- Configures data sharing with other apps
- Collects and downloads recorded activities
- Performs software and firmware updates
- HealthKit integration
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The award-winning Rhythm Heart Rate Monitors use patented technology to capture exceptionally accurate performance in both wet and dry conditions. This Scosche Rhythm Sync app: · Connects to Rhythm 24 and Rhythm+ Heart Rate Monitors · Manages Rhythm 24 activity modes and biometrics functionality: Heart Rate Only, Running, Cycling, Swimming, Heart Rate Variability, Duathlon, and Triathlon · Displays heart rate data from your Rhythm Monitors · Displays Rhythm battery level · Configures sharing with compatible heart rate tracking apps, fitness watches, bike computers, and fitness equipment, to stream your fitness-data in real time, track heart rate history, and more! · Collects Rhythm 24 recorded activities and has download capabilities · Allows for Rhythm Heart Rate Monitors software and firmware updates · HealthKit integration which allows you save workout data recorded on the sensor.
Heart Brain Connect
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***Note: The Assessment suite (in the premium version of the app) requires Bluetooth hardware to work. It has been tested, and works with the Polar H10 Heart Rate Sensor*** Heart Brain Connect is really two-apps-in-one. In Play mode the app can help to improve your well-being and increase your mindfulness. Play can be used with just your iPhone. When you select the free Play suite, Heart Brain Connect plays an animation; you breathe in (inhale) as the circles grow larger and breathe out (exhale) as the circles become smaller. The animation can be programmed to help you achieve the optimal number of breath cycles per minute, to optimize your HRV. This technique is called Resonant Breathing. Resonant Breathing maximizes the alignment between your nervous system and your heart rate. It can be an effective method to reduce stress and anxiety. While you breathe, the app can measure your heart rate and Heart Rate Variability (HRV). You can set the duration of the exercise and save the results. You will need a Polar H10 heart rate sensor to perform the measurement and produce accurate readings. The Assessment suite (subscription only) is meant to be used in research laboratories. Even though you can subscribe to access this suite and perform the exercises, if you are not a researcher, its use to you is limited. We recommend training your HRV using the free PLAY suite. This app is designed to run on iPhones, and will run in scaled mode on iPads.
Screenshots
Verdict
The clearest difference is in-app purchases: Rhythm SYNC. at none against Heart Brain Connect's 1. Rhythm SYNC. also leads on iOS requirement (12.0 vs 14.0). Heart Brain Connect's advantage is update cadence (fortnightly vs every 3 months). On price, ads 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
Both are free to download. Heart Brain Connect sells 1 in-app purchase, starting at $14.99 per month. Rhythm SYNC. asks for nothing beyond the download.
Rhythm SYNC. ships an update every 3 months, Heart Brain Connect fortnightly. The most recent releases landed on October 24, 2026 and September 19, 2026 respectively.
| Parameter | Rhythm SYNC. | Heart Brain Connect |
|---|---|---|
| Price | Free | Free |
| Rating | 1.8 (130 ratings) — better | — |
| Positive reviews | 13.1% of reviews | — |
| Number of ratings | 130 — better | — |
| Update frequency | Every 3 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 47 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Scosche | stichting brainclinics foundation |
Bugs and requests
Rhythm SYNC.
Reported bugs
17 issues- App fails to detect device despite Bluetooth connection
- Bluetooth connection drops frequently during workouts
- App crashes on startup (splash screen freeze)
- Firmware update fails repeatedly
- HRV readings not displaying or accessible
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- Custom heart rate zones not applied to recordings
- Battery level shows as zero or incorrect
- Settings menu items non-functional or unresponsive
- App loses connection when device syncs with other apps
- Data disappears when monitor disconnects
- Export to CSV ignores custom zones
- App crashes when attempting to share workout data
- Last mode setting not remembered between sessions
- Unable to modify personal details (height, weight, birthday)
- Incompatibility with iPhone X and newer models
- Firmware update window won't open
- App incompatible with iOS 11 and newer versions
Requested features
12 requests- HRV (Heart Rate Variability) mode that actually works
- Comprehensive workout history and logging
- Data export to multiple health apps (MyFitnessPal, TrainingPeaks, etc.)
- Customizable heart rate zones that persist
- Batch download and export of multiple files
Show 7 moreShow fewer
- Auto-sync feature when device is detected
- Detailed analytics and charts
- Better user profile settings (height, weight, age)
- Dark mode option
- Improved troubleshooting and help documentation
- Ability to delete saved connections to health apps
- Support for multiple languages in documentation
Heart Brain Connect
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Rhythm SYNC.
No in-app purchases
Heart Brain Connect
- Premium: Assessment suite1 Month trial$14.991 Month
Questions
Is Rhythm SYNC. free?
Is Heart Brain Connect free?
Do Rhythm SYNC. or Heart Brain Connect have ads?
Which is updated more often, Rhythm SYNC. or Heart Brain Connect?
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