With a retail price of $130, it's $20 cheaper than the Charge 3, though take note that it looks like it has a. Vivosmart 4 is pool- and shower-safe and can run for up to seven days between charges.The Garmin Vivosmart 4 is an attractive fitness tracker with accurate, in-depth metrics and up to a week of battery life.Along with the pulse ox integrated into the wearable, vivosmart 4 has an advanced. The vivosmart 4 can monitor oxygen levels at night allowing users to monitor health conditions and energy levels.During the night it also monitors body movements like tossing and turning, and can even tell when you're entering deepest periods of rest.
