BeatSleep: Wind Down to Sleep

BeatSleep does one thing. Your Apple Watch reads your heart, then vibrates on your wrist just under your own rate. Your pulse follows the vibration down, and you fall asleep. No sound, and nothing to watch. The screen exists only to prove it is working, and it fades away once you no longer need it. HOW A NIGHT GOES For the first 45 seconds nothing vibrates, while BeatSleep measures the rate you are actually resting at. Then the cadence anchors there and sheds four beats every ten minutes, staying just under your pulse: far enough to lead, close enough to be followed. If a noise wakes you, it stops pulling and re-anchors to your real heartbeat within a minute. Apple Watch gives an app only a handful of vibration patterns, and most carry a tone through the speaker. BeatSleep uses the one that does not, so the person beside you sleeps through your night. The night closes itself five…