# Rhythm SYNC. vs ONBEAT

The clearest difference is rating: ONBEAT at 3.7 against Rhythm SYNC.'s 1.8. ONBEAT also leads on iOS requirement (9.3 vs 12.0). Rhythm SYNC.'s advantage is ratings volume (128 vs 3). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ONBEAT holds the better App Store score, 3.7 against 1.8. That said, the two scores are not equally well evidenced: Rhythm SYNC. has 128 ratings behind it against 3, so its average is the more settled of the two.

## The numbers

| Metric | Rhythm SYNC. | ONBEAT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.8 (128 ratings)](https://appshunter.io/ios/app/rhythm-sync/id1226606963/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/onbeat-personal-app/id1445208988/reviews)** |
| Number of ratings | **128** | 3 |
| Positive reviews | 13.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | Free |
| Size | 47 MB | 20 MB |
| Requires iOS | 12.0 | **9.3** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Scosche](https://appshunter.io/developer/340018842) | [OnBeat LLC](https://appshunter.io/developer/1106772739) |

## 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


### ONBEAT

[App page](https://appshunter.io/ios/app/onbeat-personal-app/id1445208988)

Track your workout sessions, view detailed performance metrics like heart rate and calories burned, and manage your personal profile. Future updates will allow connection to personal heart rate monitors for comprehensive fitness tracking.

**Highlights:** View workout session data, Track calories burned, Monitor max heart rate, Display workout interval graphs, Edit personal profile information, Calculate calorie and zone metrics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rhythm SYNC. free?

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

### Is ONBEAT free?

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

### Which has better reviews, Rhythm SYNC. or ONBEAT?

ONBEAT is rated higher. Rhythm SYNC. averages 1.8 out of 5 from 128 ratings, while ONBEAT averages 3.7 from 3 ratings.

### Do Rhythm SYNC. or ONBEAT have ads?

Neither Rhythm SYNC. nor ONBEAT shows ads.

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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.*