The measurement is fast, efficient and very accurate. I compared the two other measuring heart rate but also with my cardiologist device (I'm intensive sports recovery, I followed for several years).
Not too heavy, fully waterproof, it gives you real time your heart rate. Just after a quick setting it notifies you with a beep and light the small LED located on the front portion of bpm what you are. So for my scéances cardio I can know anything that beep and the LED if I find myself in my range of maximum performance, beyond my limits or simply recovery.
There are also several very nice applications, including that of Mio but my taste is really too simplistic (this explains the missing star). In fact you have only the maximum frequency and the average frequency (at least on Android). I would have loved a graph with the evolution of my heart rate over time, it would have been great to make the links between the type of stress and the changing pace.
Finally for the ride velio or jogging there are other excellent apps. I use Wahoo Fitness, compatible with the watch and super well done.
EXCELLENT product. Farewell Thoracic belt :)))
