The NOISE bed is steady broadband sound that masks disruptive noise; TONE shifts it from deep/brown to balanced/pink. RAIN and SURF add slow, predictable natural texture with no sudden transients. DRONE is a quiet low tone used purely for comfort — no entrainment, binaural, or “miracle frequency” claims.
If you’re sensitive to sound, start with Sensory‑Simple (one steady sound) and add layers only if they help. Layered sound can become overstimulating.
Set the volume so the sound is almost forgettable, especially overnight — low volume and amber light are easier on sleep. Playback continues when you switch apps or lock the phone, and shows up in your lock‑screen controls. DIM darkens the panel for bedside use and keeps the screen awake while it’s on.
This is not medical treatment. Stop if you notice distress, headache, ear pain, or agitation. In a mental‑health emergency, contact local emergency services or a crisis line.