Mio has been in the fitness tracker market for a long time, but it’s seldom mentioned in the same breath as Fitbit, Jawbone, and Garmin. Mio was one of the first companies to focus on wrist-bound ...

While a lot of fitness tracker companies struggle to make devices that combine the best of all worlds, others are sticking to what they know. Mio has been making heart rate monitors for years—most of ...