Maybe you didn't read my link: the heart rate you are logging is wrong 50% of the time.
Btw I can't see how useful could be to log heart rate after a walk, but this is a totally different matter .....
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Sadly that is true ...
Since iPhone 5 release there isn't a single flagship that really captured my interest. I bought an iPhone 5S, and I like it, but I'm not amazed ....
S4 ... G2 ... One ... Note 3 ... Z1 ... S5 ... M8 ... None of them really excites me.
Maybe the Lumia 1520 was the interesting one, but it's really too big to be my phone.
I really hope in iPhone 6 .....