Not everyone has the luxury of carrying around a smartwatch or a fitness band to track their health, so Samsung integrated it a heart rate monitor onto the back of the phone. Unfortunately, it's a useless feature: The Galaxy S5 is too big to run with, and it's unlikely that you'd stop every few blocks to check your heart rate. What's more, Samsung specifically warns that it's not to be trusted as a medical device.
The bottom line
The Galaxy S5 is an improvement over the GS4, but it's not the same big leap that the Galaxy S4 was over the Galaxy S III: It's an all-around great phone, albeit one with shortcomings.
With the Galaxy S5 arriving in the U.S. at the same time as the HTC One (M8), it's tempting to compare the two phones to each other. The Galaxy S5 is a fantastic Android phone, but it still misses the mark on some of the things that the HTC One (M8) excels at. It's not the best for blasting music, for instance, and while the TouchWiz interface has been cleaned up, it's still a step behind HTC's. While I give the edge to the HTC One (M8), they're both excellent phones and the one that's right for you will depend on what you use your phone for.
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