Actually pretty accurate – HeartWatch: Heart Rate Tracker Review

Surprised by the way Apple has came a long way to really dial this in. The older model watches are still semi accurate but the newer models are fantastic with this app! Definitely recommend to anyone who’s curious about their health/sleep tracking and anyone with any health issues to help monitor. Not true legitimate testing that you’d receive at a hospital but dang close! Couldn’t be more happy with the progress of this app.
Review by This-app on HeartWatch: Heart Rate Tracker.