"Easy to use with iPhone and Bluetooth heart rate monitor"

"Love the sleep tracking and heart rate monitor"

"So knowing my heart rate really helps"

"Husband and niece and I found heart rates on all of them"

"It also syncs w Fitbit and my Polar heart rate strap"

"There’s nothing quite like hearing your child’s heartbeat fluttering f..."

"Cardiio helps you measure your pulse (heart rate) using your phone cam..."

"Turn your iPhone into a quick and accurate personal Heart Rate Monitor..."