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Garmin Vivosmart 4 tracks your sleep and energy levels
Garmin has launched the latest version of Vivosmart, and based on its features, the wearable is meant to be a direct competitor to Fitbit's Charge 3. Like Fitbit's new tracking device, Vivosmart 4 comes with a blood oxygen monitor called "pulse ox," which can monitor your oxygen saturation levels at night in order to gauge your sleep quality. It also has the ability to estimate light, deep and REM stages of sleep, which you can then view as sleep stats within the Garmin Connect app.
