How to Send a Heartbeat on Apple Watch
When sent, the heartbeat makes a distinctive image on your recipient’s text.
Tap Messages on the home screen of your Apple Watch. Tap the conversation or person you wish to send the heartbeat to, and then tap the Digital Touch icon. Tap and hold two fingers to the screen until the heart appears and starts to beat. Take your fingers off the screen to instantly send the message. Want to send a broken heart instead? Drag your fingers down the screen before releasing them.
How to Send a Heartbeat on iPhone
The iPhone doesn’t have a heart rate monitor, but you can still send your heartbeat through Messages.
Open Messages and tap the conversation or person you wish to send the heartbeat to. Tap in the message field, and then select the Digital Touch icon. Tap and hold two fingers to the canvas displayed at the bottom of the screen. Release your fingers to send the message. Your heartbeat is on its way.