Rhythm24WaterproofArmband Heart Rate Monitor

Rhythm24™

Waterproof Armband Heart Rate Monitor
Part Number RTHM24
Rating:
100% of 100
As low as $99.99

• Onboard Memory up to 13 hours of training time (ANT+ FIT file transfer)
Bluetooth® Low Energy / ANT+ Connection
• 24 Hour Battery Life
• 5 Heart Rate Zone Indications
• Superior accuracy with all skin tones
• IP68 Waterproof Rating

Heart Rate Monitor

Free Domestic ShippingMoney Back Guarantee - 60-Day No Hassle Returns1 Year Limited WarrantyLifetime Technical Support
Features

Train Smart, Get Fit. ™

The nucleus of our health and fitness is the heart. Being able to accurately monitor, measure, record and transmit heart rate data over an extended period of time is essential to maximizing one’s workout - whether it be running, cycling, swimming or working out in the gym. This is the very essence of the Rhythm24™. This next-generation, armband heart rate health and fitness device is highly accurate, packed with outstanding features and very comfortable to wear, so you can ditch those chest strap devices and now workout longer, in more places and in maximum comfort.

Bluetooth® Smart and ANT+

Great for use with smartphones, tablets, smart and sport watches, exercise equipment and many other devices that support Bluetooth® Smart or ANT+ heart rate data.

ANT + logo   Bluetooth logo
clock

24HR Battery Life

Extended use rechargeable battery allows you to workout for up to 24 continuous hours.


battery

Battery Life Indicator

With a 3 LED light battery indicator you’ll always know how much battery life you have left.


Hyper-accurate

Patented optical sensor technology for highly accurate monitoring and measurement with all skin tones.

Heart Rate167 BPM

Hyper-accurate

Patented optical sensor technology for highly accurate monitoring and measurement with all skin tones.

RunningCyclingSwimming

A heart-rate monitor as versitile as you are

Rhythm24™ optically measures blood flow and body movement to ensure the most accurate data possible. With its dual-mode radio you can simultaneously transmit your heart rate to multiple ANT+ displays (Garmin® watches, cycling computers, fitness equipment and more) and to your favorite Bluetooth® Smart enabled watch or smartphone app.

Up to 100 ft. Range
Allows you to wirelessly workout up to 100 feet from your mobile device or exercise equipment.


MODES:
Running
Cycling
Swimming
Heart-Rate Only
Heart Rate Variability


MULTI-MODES:
Duathlon
Triathlon

 

No chest strap required!

Breathable, soft, stretchable armband design means great comfort and ease of use. Comes with an adjustable band.

 

On Board Memory

Allows you to leave your mobile device behind, record workouts and upload data to your device later.

 

Sweatproof & Waterproof

IP68 sweat and waterproof construction means the same great accurate performance in both dry and wet conditions. Rhythm24™ can even be submerged up to 10 ft.

 
PLAY FULL SCREEN WITH SOUND

Green/Yellow optical sensor array

Provides superior measurement with all skin tones. Better than monitors and watches that employ only green sensors.


Green and Yellow Sensors

Why train with a heart-rate monitor?

Finding your personal heart rate zone and training with heart rate intervals allows you to maximize your workout. Simply put, if you train at lower heart rates (BPM or Beats Per Minute) it will require you to workout longer to achieve benefits. If you work out at BPMs that are too high for a prolonged period, you will burn out too fast, before you’ve reached your workout goals. Rhythm24 has advanced optical sensors that will give you a precise BPM reading so you can stay in your zones and receive the maximum benefit from your workout!

The chart below illustrates the relationship between heart rate levels and workout efficiency during interval training. Please consult your physician before starting any exercise routine to ensure that you are healthy enough to engage in a training regiment. Heart rate zones vary by a person’s age, consider consulting a personal trainer regarding the appropriate heart rate zones for you.

* Maximum heart rate varies depending on your personal health and fitness level. Consult your doctor and trainer prior to heart rate interval training to determine your max BPM.

Track ChartWARM UP114BPM133152171COOL DOWNBURN BABY BURN!INTERVALTRAINING STAGE
Track Runners

Seriously compatible

Works with the most popular fitness apps - over 200 in all.

Stream your fitness-data in real time to any one of the hundreds of compatible iPhone and Android apps, fitness watches, bike computers and fitness equipment.

fitness appsCompatible with over200+Fitness Apps

We’ve got an app for that

Scosche's Rhythm Sync app allows for communication with the Rhythm24 Heart Rate Monitor.

  • Connects to Rhythm24 Heart Rate Monitor
  • Displays heart rate date from Rhythm24
  • Displays Rhythm24 battery level percent indicator
  • Configures sharing with compatible apps, fitness watches, bike computers and fitness equipment
  • Facilitates Rhythm24 software and firmware updates
  • HealthKit integreation which allows you to store heart rate data

Apple iOS OS

iOS and Android Apps
quotes

To go from swimming, to biking to running quickly and to have your heartrate tracked alongside that just makes for an easy day of training.

- Kip Sharbono, Triathlete / Community Center Director

quotes

To go from swimming, to biking to running quickly and to have your heartrate tracked alongside that just makes for an easy day of training.

- Kip Sharbono, Triathlete / Community Center Director
Play Video
Play Video

Band Placement

For the most accurate reading​s​, wear the Rhythm24 on the ​upper forearm, biceps, or triceps snug enough to not move on your arm, but NOT so tight that it restricts ​circulation.

  • Bicep
  • Tricep
  • Upper Forearm
Rhythm24 Band Placement

Band Placement

For the most accurate reading​s​, wear the Rhythm24 on the ​upper forearm, biceps, or triceps snug enough to not move on your arm, but NOT so tight that it restricts ​circulation.

  • Bicep
  • Tricep
  • Upper Forearm
Play Video

quotes

It’s been really wonderful to have a product that no matter what the modality I’m working on it stays, it’s comfortable and I don’t notice it most importantly.

- Bailey Evans, Triathlete / Owner of Ekam Yoga
Play Video
quotes

It’s been really wonderful to have a product that no matter what the modality I’m working on it stays, it’s comfortable and I don’t notice it most importantly.

- Bailey Evans, Triathlete / Owner of Ekam Yoga
Specs
  • Onboard Memory up to 13 hours of training time (ANT+ FIT file transfer)
  • Bluetooth Low Energy / ANT+ Connection
  • 24 Hour Battery Life
  • 5 Heart Rate Zone Indications
  • Superior accuracy with all skin tones
  • IP68 Waterproof Rating

iPhone

iPhone 11 Max
iPhone 11 Pro
iPhone 11
iPhone Xs
iPhone Xs Max
iPhone Xr
iPhone X
iPhone 8 Plus
iPhone 8
iPhone 7
iPhone 7 Plus
iPhone SE
iPhone 6S
iPhone 6S Plus
iPhone 6
iPhone 6 Plus
iPhone 5C
iPhone 5S
iPhone 5
iPhone 4S

Smart Phone

Galaxy S9/S9+
Galaxy S8/S8+
Galaxy Note 9
V35
V30/V30+
G7
G6
V40 ThinQ
Moto Z
+6
HTC 10
And most Android Smartphones

iPad

iPad Pro - 1st gen
iPad Pro - 2nd gen
iPad Pro - 3rd gen
iPad - 2nd gen
iPad - 3rd gen
iPad - 4th gen
iPad - 5th gen
iPad Mini - All
iPad Air - All
Write Your Own Review
Add a Review:
File Downloads
FAQ

Rhythm24 Questions

It uses internal accelerometers to detect rhythmic body sway while running or pedaling.

They stay lite until the internal capacitors are discharged.

Set mode within Rhythm Sync app. Once set, the Rhythm24 will start in swimming mode and when transitioning, all you need to do is double tap the large multi-function button on the device and it will switch to the next mode… biking then running. You can record your entire race and upload the data to your mobile device after, and you will see all three of your stages with the corresponding data that comes with each of those sport modes.

Set mode within Rhythm Sync app. Once set, the Rhythm24 will start in running mode and when transitioning, all you need to do is double tap the large multi-function button on the device and it will switch to the cycling mode. You can record your entire race and upload the data to your mobile device after, and you will see both of your stages with the corresponding data that comes with each of those sport modes.

This indicates your Rhythm24’s storage level: 3 LEDs = 66 - 100%, 2 LEDs = 33 - 66%, and 1 LED = 0 - 33%

To check the battery level with the unit on, press and hold the MFB for 2 seconds. The LEDs will indicate your battery level: 3 LEDs = 66 - 100%, 2 LEDs = 33 - 66%, and 1 LED = 1 - 33%

There is not a mode we call "rest", but we do have a heart rate only mode that turns off cadence and some other functionality to maximize battery life and memory.

Set Mode within Rhythm Sync app to activate Heart Rate Variability for Rhythm 24. Then use your favorite HRV app to record HRV data.

High heart rate variability is an indication of especially cardiovascular, but also overall health as well as general fitness. Generally speaking, it tells us how recovered and ready we are for the day. Also, HRV can react to changes in our body even earlier than heart rate. This makes it a particularly sensitive tool that gives us insights into our wellbeing.

No, the recording is stored on a separate flash from where the firmware is stored.

Bluetooth doesn’t work in the water, cannot transmit. The Rhythm24 does have a record feature so you can record your swimming data and upload it to your mobile device after your swim.

Ant+ doesn't work in the water. The Rhythm24 has record mode, so you can record your swimming data and upload it to your mobile device after you swim.

Yes, we have reviewed testing that shows both the Rhythm24 and top chest straps reporting 94% accuracy and response.

Nope - new band design for the Rhythm24

Yes, it has an IP68 waterproof rating and that is to a depth of 3 meters.

The Rhythm24 and Rhythm+ can be worn in multiple locations on your arm while providing the highest level of accuracy. Wear the Rhythm HR monitors on your upper forearm, biceps, or triceps snug enough to not move on your arm, but not so tight that it restricts circulation.

To record a workout while in a Multi-Sport Mode:

  1. Press and hold the small RHYTHM24 button to begin recording.

  2. Double- press MFBs to toggle between recording orange tri-LEDs, and green tri-Leds.

  3. NOTE - Green tri-LEDs need to be visible on RHYTHM24 to toggle between workout legs of MultiSports Modes.

  4. Double-press MFB to change workout legs.

Rhythm Sync (App) Questions:

Utilize Rhythm Sync’s Help feature within the app using the i icon.

  • Save a workout to Rhythm Sync App from RHYTHM24 Monitor:

    1. Tap on workout to save, choose Download button

    2. File moves to Saved Workouts section

  • Share / Export / Delete from Saved Workouts:

    1. Tap on workout to see options

  • Delete Workout Files:

    1. To delete files individually, the Rhythm Sync app is required

    2. Swipe a “Workout on Monitor” file to the left to see delete button

Your heart rate zones are customized based off of your you personal info you provide within the My Details page of the Rhythm Sync app.

Random Questions:

If you know your laboratory tested current max heart rate, use that. If not, a great starting point is your age-predicted max heart rate, by subtracting your age from 220.

Orangetheory’s Beat Flex is a proprietary device that works specifically in Orangetheory gyms and is available to purchase at their locations all over the world.

Nope, we can’t do that.

Nope. we can’t do that.

Yes you can and it provides a more accurate heart rate reading.

Yes, it will.

Yes, Rhythm 24 has ANT+™and Bluetooth®.

Please, hand wash only with mild soap if needed.