# Rhythm SYNC.

> Connects to heart rate monitors, displays data, and manages activity modes. (iPhone/iPad app by Scosche.)

- Source: https://appshunter.io/ios/app/rhythm-sync/id1226606963 (this page in markdown: same URL + `.md`)
- Developer: [Scosche](https://appshunter.io/developer/340018842)
- Category: Health & Fitness, Sports
- Price: Free
- Rating: 1.80/5 from 128 App Store ratings · 99 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 47 MB
- Languages: American English
- Released: 2018-04-25
- Data updated: 2026-09-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/rhythm-sync/id1226606963/reviews.md

## What is Rhythm SYNC.?

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.

## Key features

- 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

## What do users think of Rhythm SYNC.?

Overall sentiment: negative

**Pros**

- ✅ 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)
- ⏱️ Quick firmware updates when functional
- 🎯 Minimal setup required for basic use

**Cons**

- 🐛 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
- 🔌 Inconsistent syncing with own app
- ❌ Poor compatibility with newer iOS versions
- 😤 Unreliable wireless range despite advertised specs
- 🚫 Missing core features advertised on product page
- ⚙️ Settings and preferences don't save properly
- 📤 Data export and sharing features broken
- 🔄 Inconsistent performance across devices

**Commonly 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
- 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

**Most 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
- 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

## Recent user reviews (10 of 99)

All indexed reviews: https://appshunter.io/ios/app/rhythm-sync/id1226606963/reviews.md

### 5/5 — Works fine for me

*2026-05-31, version 2.21*

I really appreciate this app. I use other apps to keep track of my workout data. This app does exactly what I wanted it to do: I can see my battery level and it immediately updated the device’s firmware flawlessly.  Thank you!

### 2/5 — HRV reading

*2026-04-27, version 2.21*

Daily struggle connecting to HRV from HR. Works well in HR mode but despite changing several times, generally can’t get it in HRV mode.
The triple button press sounds easier than it probably is. This app never showed the HRV readings but Elite HRV did (once or twice). It would be nice to know what’s going on with this. Otherwise basic but reliable device & app.

### 1/5 — No HRV

*2026-02-03, version 2.21*

The device page on Amazon states that HRV is supported. There is no way to turn it on in this app.

### 5/5 — Works fine

*2025-08-12, version 2.20*

Quick to install and easy to Connect to my scosche Sensors. Does what it is supposed to do!

### 5/5 — Very basic but functional.

*2025-02-22, version 2.20*

The rhythm 24 heart rate monitor seems to be a very accurate and decent product with good functionality. This app however, is extremely basic. I don’t think this app was actually intended to be used for more than its basic features. Which are to show you your heart rate, heart rate zones, battery level, software updates, basic settings. You definitely need a different app to enjoy all the functionality and features of your heart rate monitor. If you set your expectations for these basic features, the app is functional. If you expect anything more like what an exercise program is going to give you that is not what this app does.

### 1/5 — App打開連不上

*2025-02-13, version 2.20*

藍芽已連線
打開app常常連不上
很爛

### 2/5 — Can’t pair with Rhythm 24

*2024-08-16, version 2.20*

Tried many times, even deleted and reinstalled this app and STILL won’t pair. Can’t use the app if it won’t pair with the devices it’s meant to be used with!!!

### 1/5 — Rubbish

*2024-07-06, version 2.20*

This is a terrible app! Do your kettle bell workout and think it’s recording details like HR on Apple health then forget it. Absolutely rubbish

### 1/5 — Garbage

*2024-07-01, version 2.20*

Nothing works. Terrible UI. No troubleshooting available. This is either an example of a team having no budget to work with or really lacking development.

### 1/5 — Horrible range

*2024-06-20, version 2.20*

Device is literally 10 feet from me and it disconnects saying “No monitors available”, the website specifically states “Up to 100ft Wireless Range”, this is false advertising at it’s finest and this app should be reported and not recommended by the company. Waste of time.

## Frequently asked questions about Rhythm SYNC.

### What does the Rhythm SYNC. app do?

The Rhythm SYNC. app connects to Scosche Rhythm 24 and Rhythm+ heart rate monitors. It displays real-time heart rate data, manages various activity modes like running and swimming, and shows the monitor's battery level. The app also facilitates software updates and data sharing with other fitness applications.

### What are the key features of the Rhythm SYNC. app?

Key features include connecting to Rhythm heart rate monitors, managing activity modes and biometrics, displaying heart rate and battery data, configuring real-time data streaming to other apps, collecting and downloading recorded activities, performing software/firmware updates, and integrating with HealthKit to save workout data.

### Is the Rhythm SYNC. app free to use?

Yes, the Rhythm SYNC. app is free to download and use. The provided information indicates no in-app purchases or advertisements, suggesting a completely free experience for users who own compatible Scosche Rhythm heart rate monitors.

### What devices is the Rhythm SYNC. app compatible with?

The Rhythm SYNC. app is designed to work with Scosche Rhythm 24 and Rhythm+ Heart Rate Monitors. It also supports sharing data with compatible heart rate tracking apps, fitness watches, bike computers, and fitness equipment, and integrates with HealthKit on compatible Apple devices.

### How can I use the Rhythm SYNC. app for my workouts?

You can use the Rhythm SYNC. app to connect your Scosche heart rate monitor, select specific activity modes like running or cycling, and view your heart rate in real-time during your workout. The app also allows you to track your heart rate history, manage recorded activities, and sync your data with other fitness platforms or HealthKit.

## Version history (last 5 releases)

### 2.21 — 2025-12-30

HRV Mode on the Rhythm+2.0 brings advanced performance insights to your training, letting you track your body’s stress, recovery, and readiness with clinical-level precision. By measuring the subtle variations between each heartbeat, it delivers a deeper understanding of how your body responds to workouts, sleep, and daily stress. It’s a powerful new layer of intelligence that turns the Rhythm+2.0 into more than a heart rate monitor—it’s your personal performance coach. Pair to your favorite HRV app while in HRV mode. 

Once firmware has been updated, activate HRV Mode with a triple button press and back to Heart rate mode with a triple button press.

### 2.20 — 2024-01-19

Upgrades and firmware updates.

### 2.19 — 2022-12-29

Updates to firmware for R2.0

### 2.17 — 2021-10-22

Updated firmware and improvements in setting heart rate thresholds

### 2.16 — 2021-03-31

Update to my details section to fix a bug some user experienced. The section now saves separate max and custom values that the user can switch between.

## Apps similar to Rhythm SYNC.

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [FITIV Pulse - Workout Tracker](https://appshunter.io/ios/app/fitiv-pulse-workout-tracker/id942494517) | 4.6 (12,632) | Free | Health & Fitness |
| [Echo: Watch Heart Rate Monitor](https://appshunter.io/ios/app/echo-watch-heart-rate-monitor/id1494679144) | 4.4 (3,656) | Free | Health & Fitness |
| [iCardio Workout Tracker](https://appshunter.io/ios/app/icardio-workout-tracker/id314841648) | 4.8 (3,364) | Free | Health & Fitness |
| [HRV4Training](https://appshunter.io/ios/app/hrv4training/id686923970) | 3.6 (288) | $9.99 | Health & Fitness |
| [Elite HRV: Wellness & Fitness](https://appshunter.io/ios/app/elite-hrv-wellness-and-fitness/id868829970) | 4.7 (6,835) | Free | Health & Fitness |
| [Morpheus Training](https://appshunter.io/ios/app/morpheus-training/id1259741445) | 4.8 (18) | Free | Health & Fitness |

## More apps by Scosche

- [Fitness Utility](https://appshunter.io/ios/app/fitness-utility/id661537331)
- [Scosche Player](https://appshunter.io/ios/app/scosche-player/id1158527635)

All apps by Scosche: https://appshunter.io/developer/340018842

## Related topics

[scosche rhythm](https://appshunter.io/ios/topics/scosche-rhythm) · [scosche](https://appshunter.io/ios/topics/scosche) · [herff jones](https://appshunter.io/ios/topics/herff-jones)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*