Garmin Vivosmart 4 goes after Fitbit Charge 3 with slim design, pulse ox sensor

While Garmin has yet to try its hand at a mainstream Apple Watch challenger, leaving arch-rival Fitbit struggling to turn the Versa and Ionic into commercial hits, when it comes to activity trackers, every action gets an almost instant reaction.

Case in point, the inexpensive, health-focused Garmin Vivosmart 4 has arrived hot on the heels of the Fitbit Charge 3 with a similar price tag and nearly identical list of features.
Both affordable wearable devices are essentially capable of the same things, tracking your heart rate, providing insight into your sleep habits and quality of rest, ...