Garmin's Vivosmart 3 activity tracker may not have HR in its naming scheme like its predecessors -- the Vivosmart HR and GPS-enabled Vivosmart HR+ -- but it does include a heart-monitor with 24-7 monitoring and adds new, smarter features while returning to the slimmer design and hidden display of...
The Garmin Vivosmart 3 is slim, very comfortable to wear, has a built-in heart-rate monitor and is fully waterproof; It's loaded with extra features, including stress-level measurements, VO2 Max readings, and a rep counter; It shows notifications from your phone
Some of the features are a little difficult to access on the watch; the display isn't as sharp as some competing models' displays