Slow Wave

Slow Wave is a focused audio app for winding down before bed. Starting a session plays a sound rhythm that repeats slowly at 0.8Hz. Add a gentle background sound only when you want it, then adjust each layer separately to a comfortable level. Features - A base audio rhythm repeating at 0.8Hz - Three optional background sounds - Separate level controls for rhythm and background - Automatic stop after 1, 2, 4, or 8 hours - A one-time local wake-up alarm - Audio that continues with the screen off - Korean and English interfaces All audio is included in the app, so Slow Wave works without an account or network connection. Slow Wave does not measure sleep or diagnose or treat any medical condition.