ECG for Apple Watch - ECG app and irregular heart rhythm notification
Thriva - Smart finger-prick blood tests you take at home
AliveCor Mobile ECG - A freakin' heart monitor for your smartphone
Werlabs - Monitor your health with a range of blood tests
checa - Understand your body through blood tests and interpretations
HeartIn Portable Electrocardiograph - PC/Smartphone compatible ECG. Check your heart anywhere.