# Rhythm SYNC. vs TrainCredits

The clearest difference is update cadence: TrainCredits at every 3 weeks against Rhythm SYNC.'s every 3 months. Rhythm SYNC.'s advantage is iOS requirement (12.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Rhythm SYNC. ships an update every 3 months, TrainCredits every 3 weeks. The most recent releases landed on October 2, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Rhythm SYNC. | TrainCredits |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (128 ratings)](https://appshunter.io/ios/app/rhythm-sync/id1226606963/reviews)** | — |
| Number of ratings | **128** | — |
| Positive reviews | 13.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 47 MB | 5 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Scosche](https://appshunter.io/developer/340018842) | [Winston With](https://appshunter.io/developer/1889604163) |

## 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


### TrainCredits

[App page](https://appshunter.io/ios/app/traincredits/id6761436028)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rhythm SYNC. free?

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

### Is TrainCredits free?

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

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

Neither Rhythm SYNC. nor TrainCredits shows ads.

### Which is updated more often, Rhythm SYNC. or TrainCredits?

Rhythm SYNC. ships an update every 3 months, and TrainCredits every 3 weeks. Most recently, Rhythm SYNC. was updated on October 2, 2026 and TrainCredits on October 7, 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.*