Lucid · Smart Wake (in design)
Sleep / Wearables
Alarm that doesn't just hit you with a noise at a fixed time. Reads heart-rate variability + motion from a watch to estimate sleep stage, then triggers in the next light-REM window, so you surface naturally rather than getting cortisol-slapped out of deep sleep.
WearOS · watch HRV, REM-stage estimation, circadian timing, Android, in design