The Tracker: Swimmaxt Fitness Tracker With Heart Rate Monitor, Waterproof Activity Tracker Watch ($40)
The Rating: 4.3 stars
Why People Love It: If you're on the hunt for something affordable, we found your match. This customer was pleased with all features and the low price. "This tracker has totally transformed my exercise routine. I loved being [able to] watch my sleep patterns and compare my heart rate to my workouts. I couldn't believe the quality of this band for the price.