Some consumers recently took Fitbit to court over its claims of heart-rate accuracy, but tests by the respected USĬonsumer Reports organisation backed up Fitbit’s reasonable level of heart-rate accuracy. Wristband heart-rate monitors instead use an optical heart rate monitor that detects the pulse by shining a light through the skin to see blood flow. This will truly measure your heart rate at source. If you want super-accurate heart-rate data then you need to strap a specialist device to your chest. if you want a waterproof Fitbit you need either the Flex 2 or latest Ionic smartwatch read our And like the Alta, the main body is metal so it’s tougher but sadly not waterproof (it is water resistant, so fine in the rain or a particularly sweaty gym session or run). The interchangeable wristbands work very much like the Fitbit Alta’s straps. Fitbit Charge 2: Wristbands & Accessories Read ourįitbit Versa review and Fitbit Ionic review. We like the Charge 2 because it boats nearly all the features and functions as the higher-end Fitbit Versa and Ionic, but in a slimmer, lighter band that can even be work alongside a watch if you prefer to keep your old timepiece. Sleep Insights are also available to Charge 2 owners in the Fitbit app. Later, Fitbit added a further bunch of new features (pictured above) for Charge 2 users when they update their Charge 2 firmware, including: Workout Pause Function Guided Breathing vibration cues Do Not Disturb option improved Heart Rate Zone display on-device battery life and a new clock face.įrom March 2017 Fitbit added the impressive Sleep Stages, which uses accelerometer data and heart-rate variability to estimate how long you spend in Light, Deep and REM sleep stages.
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