Heart Rate

Pair Bluetooth heart-rate sensors with Seconds. On iPhone, pair via Apple Health and Seconds reads from there. Direct pairing with Seconds is the only option on iPad, which doesn't have Apple Health.

Adding Sensors

Wear your sensor and tap Discover Nearby Sensors. Select your sensor when it appears in the list.

To show the reading during workouts, configure your timer display to include the heart-rate field.

Removing Sensors

Swipe left on a row in My Sensors and tap Delete. Or tap Edit in the navigation bar, tap the delete icon, then Delete.

Troubleshooting

If a sensor won't pair after being previously paired in iOS Settings, unpair it from iOS Settings first.