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Won't use the built in heart monitor on Galaxy Note 4. User Interface in two different languages with no clear way to choose English only.
It won't use the built in heartbeat sensor in my GS7
Useless for me. Language is not English and not user friendly at all. Waste
ECG and heart rate monitors are different, your phones may be able to measure the blood flow through the change of skin tone as your heart beats, but it most certainly doesn't measure electrical impulses in your body, which is very different necessary for people who work in stressful environments or suffer from some form of heart failure Your phone heart monitor will not detect a heart attack for example, you need an ECG for that
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Most Precise Heart Rate Monitor Ever + Unlimited Measurements and Records.