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GT HITGX Smart Watch Answer/Make Calls, 1.85" Fitness Tracker for Women & Men, Fitness Watch with Blood Oxygen/Sleep Monitor/Heart Rate Monitor, Step Counter for iPhone & Android: Amazon.co.uk: Sports & Outdoors
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iPhone users can now use Google Fit to measure heart rate, respiratory rate | Technology News,The Indian Express
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Jealous of S5 heart rate monitor? Your iPhone can already measure your heart rate with these apps - 9to5Mac
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