The problem with many pulse monitors worn without chest straps is that they tend to be pretty inaccurate when compared to a chest strap heart rate monitor. The RHYTHM is different. It's comfortable neoprene strap is worn on the widest part of the forearm, the RHYTHM combines to alternating LEDs with a photo sensor to measure your pulse continually. Additionally, it had a built in accelerometer to contextualise the pulse readings to the type of workout and provide very accurate information such as calories burned, speed, pace and distance.
The app itself let's you set a workout goal, such as a target heart rate zone or an amount of calories you wish to burn. During your workout it'll show you your current pulse, heart rate zone, calories burned and also the calories remaining in your goal if you've chosen then option. I particularly like the lock screen function of the app, allowing you to lock your iPhone's screen with the app data displayed for quick viewing (unlock it with nothing more than a swipe).
Another handy feature is that you can stream music through the RHYTHM app and then use the buttons on the front of the RHYTHM to adjust volume and play/pause a track.
The RHYTHM is powered by a lithium-ion battery and can provide up to 6 hours of continuous monitoring or last for a week worth of 45-60 min gym sessions. It's charged using the included cable which clips onto the back of the device.
Overall, I'm really impressed with the RHYTHM. I tested it against my Polar FT4 HRM during a dance workout and there was only a difference of around 35 calories by the end of the session. The device is very comfortable to wear, easy to put on (no need to faff around with a chest strap that needs running under the tap beforehand!) and it won't slip down your arm during even the most energetic workout. Sometimes the glowing LED on the front can be a little distracting (especially if the lights in the room are dimmed!) and it's not the most discrete way of tracking your workout but other than that it's quite a well designed device and It's certainly a good alternative for anyone who wants a pulse monitor without a chest strap.
You can buy the Scosche RHYTHM in either pink or yellow for around £65 on Amazon.co.uk.
I received a free sample of the product for the purpose of review but was not compensated in any other way. As always, opinions are my own!