# Rhythm SYNC. vs Heart Brain Connect

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.

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.

## The numbers

| Metric | Rhythm SYNC. | Heart Brain Connect |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (130 ratings)](https://appshunter.io/ios/app/rhythm-sync/id1226606963/reviews)** | — |
| Number of ratings | **130** | — |
| Positive reviews | 13.1% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 47 MB | 45 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Scosche](https://appshunter.io/developer/340018842) | [stichting brainclinics foundation](https://appshunter.io/developer/1571191957) |

## What reviewers say

### Rhythm SYNC.

[App page](https://appshunter.io/ios/app/rhythm-sync/id1226606963)

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.

**Highlights:** 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

**In-app purchases:** none

**What reviewers like**

- ✅ Accurate heart rate readings
- 🔋 Long-lasting device battery life
- 🔄 Reliable device hardware
- 📱 Simple and straightforward interface
- 🔗 Works well with third-party apps (Peloton, Garmin, Apple Watch)

**What reviewers complain about**

- 🐛 Frequent Bluetooth connection failures
- 🐛 App crashes and freezes regularly
- ❌ App doesn't recognize connected devices
- ⚠️ HRV mode difficult or impossible to access
- 📊 Extremely limited app functionality

**Reported bugs**

- 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

**Requested features**

- 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


### Heart Brain Connect

[App page](https://appshunter.io/ios/app/heart-brain-connect/id1571191475)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium: Assessment suite | $14.99 | per month |


## Frequently asked questions

### Is Rhythm SYNC. free?

Rhythm SYNC. is free to download, with no in-app purchases.

### Is Heart Brain Connect free?

Heart Brain Connect is free to download, with in-app purchases available.

### Do Rhythm SYNC. or Heart Brain Connect have ads?

Neither Rhythm SYNC. nor Heart Brain Connect shows ads.

### Which is updated more often, Rhythm SYNC. or Heart Brain Connect?

Rhythm SYNC. ships an update every 3 months, and Heart Brain Connect fortnightly. Most recently, Rhythm SYNC. was updated on October 24, 2026 and Heart Brain Connect on September 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*