Those little gadgets can track swimming activity too.. . The heart rate monitor is a nice bonus, as many waterproof trackers do not support that particular feature.
Here, we have a list of the Best Waterproof Fitness Bands with Heart Rate Monitor Tracking and GPS. If you are a fitness freak, this post is just for you.
Here's your guide to the best waterproof fitness trackers for swimming.. Garmin also does produce a chest-strap heart rate monitor specifically for swimming.