The chart was created by engineer Brad Larson of Sunset Lake Software and co-founder of SonoPlot.
"Extracted the raw Apple Watch HealthKit heartrate samples after a run and compared it to an HR monitor I had on"
"Aside from the Apple Watch capturing heartrate once per 5 s, and the Mio Alpha every 3 s, the readings are nearly identical. Impressed."
Take a look at the chart below and please follow iClarified on Twitter, Facebook, Google+, or RSS for more Apple news, videos, and tutorials.
Read More [via @evilpenguin_]