Heavy Sleepers
Why loud alarms fail heavy sleepers and what actually works — from arousal threshold to silent wake-ups.
Start here — pillar guide
The Complete Guide to Waking Up as a Heavy Sleeper
A full guide to fixing unreliable wake-ups: heavy sleeper basics, alarm types, shared-schedule situations, travel and shift work, and building a routine that sticks.
Read guideWhat Actually Makes Someone a Heavy Sleeper?
Heavy sleeper is not one single trait. A breakdown of arousal threshold, sleep debt, and habituation, and what to do about each.
Why Loud Alarms Do Not Work for Heavy Sleepers
Heavy sleepers often cannot rely on loud alarms. Here is why sound-based alarms fail, and what tends to work better.
Silent Alarms for Light Sleepers vs Heavy Sleepers: Is There a Difference?
Silent vibration alarms help heavy sleepers and light sleepers for different reasons. A breakdown of both use cases.