Sleep
Stories and music that gently fade out
A quiet page: pick a story or music (or nothing, for a gentle mix), tap Goodnight. Volume rises over 30 seconds, then fades over the last 3 minutes and stops.
Moby Dick by Herman Melville, read by Stewart Wills for LibriVox. Public domain, hosted on archive.org.
All from Wikimedia Commons; tap a link for the file page.