Its GPS encounters major issues when the strap is done up fairly tightly, which you need to do with any wrist-worn wearable in order to achieve the best possible heart rate readings. Run with a phone?

Both devices monitor the basics, though, including heart rate, steps, distance ... a rose gold case with a pink strap and a rose gold case with a red strap. Fitbit Charge 6 vs. Fitbit Versa 4: Health ...