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Rhythm SYNC.

Rhythm SYNC.

by Scosche

128 ratings
98 reviews
💪 Health & Fitness
⚽ Sports
Free

Details

  • Released
  • Updated
  • April 25, 2018
  • December 30, 2025

Developer

Scosche
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❓5 answered
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About

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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What users say

Summarized from real user reviews of Rhythm SYNC.. Based on 128 reviews and a 1.8/5 average, it highlights the 7 positives and 12 negatives reviewers mention most about this Health & Fitness app.

Positive things

  • ✅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

Negative things

  • 🐛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
See all reviews

What's New in Rhythm SYNC.

2.21

December 30, 2025

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.

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User reviews

Most RecentHighest RatedLowest Rated

HRV reading

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.
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niTcHiooniTcHioo

No HRV

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

Works fine

Quick to install and easy to Connect to my scosche Sensors. Does what it is supposed to do!
Fe2lxFe2lx

Very basic but functional.

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.
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007BondMI6007BondMI6

App打開連不上

藍芽已連線
打開app常常連不上
很爛
Cathy3720Cathy3720
See 93 more reviews

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User experience

🐞

Reported Bugs

17 issues

App fails to detect device despite Bluetooth connection

Bug

Bluetooth connection drops frequently during workouts

Bug

App crashes on startup (splash screen freeze)

Bug

Firmware update fails repeatedly

Bug

HRV readings not displaying or accessible

Bug

Custom heart rate zones not applied to recordings

Bug

Battery level shows as zero or incorrect

Bug

Settings menu items non-functional or unresponsive

Bug

App loses connection when device syncs with other apps

Bug

Data disappears when monitor disconnects

Bug

Export to CSV ignores custom zones

Bug

App crashes when attempting to share workout data

Bug

Last mode setting not remembered between sessions

Bug

Unable to modify personal details (height, weight, birthday)

Bug

Incompatibility with iPhone X and newer models

Bug

Firmware update window won't open

Bug

App incompatible with iOS 11 and newer versions

Bug
✨

Requested Features

12 requests

HRV (Heart Rate Variability) mode that actually works

Feature

Comprehensive workout history and logging

Feature

Data export to multiple health apps (MyFitnessPal, TrainingPeaks, etc.)

Feature

Customizable heart rate zones that persist

Feature

Batch download and export of multiple files

Feature

Auto-sync feature when device is detected

Feature

Detailed analytics and charts

Feature

Better user profile settings (height, weight, age)

Feature

Dark mode option

Feature

Improved troubleshooting and help documentation

Feature

Ability to delete saved connections to health apps

Feature

Support for multiple languages in documentation

Feature

FAQ

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.