Besides the usual pedometer, diet, and exercise recordings, that come with its S Health app, Samsung has now paired it with something really interesting - a built-in heart rate monitor, located next to the LED flash. This sensor works on the same principle that the optical one on the Gear 2 smartwatch does, and you can further customize the experience with an abundance of third party apps, that take advantage of the combined health and fitness trackers on the phone.We found the heart rate monitor to do its job fine most of the times, quickly taking our pulse, though it was sometimes finicky and seems a bit cumbersome to use on a regular basis. Not that it's that hard to just press your finger against the area next to the LED flash, but taking out your phone while running, or when in a crowded place to do this seems more of a stretch than doing it with a wrist wearable like the Gear 2, for instance.

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