Sounds to help you sleep.
The sound that helps is the sound that asks nothing of you. Television talks; a playlist moves; silence fails because every noise a house makes lands in it like a footstep. What works is a steady sound wide enough to lean on — pressure without event, so the mind has nothing left to follow.
Rain does this best, and slow beats under the rain do it better. The rain covers what would snag you — the fridge, the street, the house settling — while a slow pulse eases the brain down through its gears. Nothing arrives; nothing competes; there is no next thing to hold, which is the whole design.
A session of it is waiting above: dark rain with a descending rhythm under it, fifteen minutes from a working volume down to a quiet end. Press play before you lie down so the phone can stay where you won't reach it — the session ends on its own, no ads, nothing to install.
Make the room boring on purpose. Dark, cool, the same time each night. Boring is the point — nothing in the room to interest an awake mind, and a sound underneath it that never becomes interesting either. That's the room sleep arrives in.
It's playing above, one tap away. Rain and slow beats, steady the whole way down.