It seems like within the last ten years, every other gadget to be released has some sort of heart rate monitoring capability ... is generated by video of your finger covering the phone camera.

Walmart's Vibeat Pulse Oximeter, Bluetooth Finger Oxgyen Monitor with Heart Rate for Sport is now just $13.88 (regularly $69.99.) The pulse oximeter has a 4.6 out of 5 star rating with nearly ...

with sensors built into the ceramic heart rate monitor under the watch and the Digital Crown. Fire up the ECG app, pop your finger on the crown, and you’ll be guided through the reading.

But distance, time and pace are all blunt tools for measuring effort, which is where heart rate monitors come in. Tracking your beats per minute (BPM) unlocks extra insights, from real time effort ...