sotto includes five noise colors (white, pink, brown, grey, violet), four nature sounds (rain, ocean, wind, creek), and a continuous spectrum blender that lets you dial in any point between white and brown noise. premium also includes binaural beats.
the spectrum blender lets you smoothly transition between white, pink, and brown noise rather than choosing a fixed color. slide the control to find the exact frequency balance that works best for your ears.
binaural beats play slightly different frequencies in each ear, creating a perceived tone that can promote relaxation. sotto offers delta (1-4 Hz, deep sleep) and theta (4-8 Hz, drowsiness) frequencies that layer beneath any sound.
with your permission, sotto can read sleep data from apple health and display it alongside your session history. this helps you see how different sounds affect your sleep quality. sotto only reads data — it never writes to apple health.
open sotto, go to settings (gear icon), and tap "restore purchases." if you're signed into the same apple id you used to subscribe, your premium access will be restored.
yes. all sounds are generated on-device. sotto works without an internet connection.
subscriptions are managed through apple. go to ios settings > your name > subscriptions > sotto, then tap "cancel subscription."
sotto is optimized for overnight use. it uses the system audio engine efficiently and supports background audio. battery impact is minimal — comparable to playing music overnight.