Most bedtime advice ends at the same place: turn on some white noise. For a lot of children that works. For a lot of autistic children it's the thing that keeps them awake — in one clinical test, 9 of 21 autistic children without an intellectual disability would not tolerate white noise at all. This app starts from the other end: nothing plays until you choose it, every sound can be turned off, and the quiet has a planned ending. Built for children roughly 2 to 15 — these sleep difficulties don't reliably fade with age the way they usually do.
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You dimmed the lights. You turned on the white noise everyone recommends. And your child is more awake than before you started — because that advice was built for someone else's nervous system.
This app doesn't decide for your child.
It waits to be told.
27 instrumental pieces, composed in the style of the great masters — steady tempo, no sudden changes, no vocals. Every ambient sound in the mixer starts at zero; nothing is pre-selected for your child.
Record your own voice — a few familiar words, played back whenever needed. Layer in rain, ocean waves, a heartbeat, or pink noise next to white for children who find it gentler — each sound gets its own volume slider, and there is no universal setting.
A night light with a no-motion option — one still color instead of drifting shapes — for children who find movement more distracting than dark. Auto Screen Off is on from the start: two minutes after the music begins it turns the display black, and about 20 seconds beforehand a short notice says it's coming — so the change is expected, not a surprise.
Tap a color or No motion to preview — set your own in the app
In the app it starts on a dim red-orange with no blue light in it — and away from yellow, a color autistic boys clearly avoided in one study.
Which sound settles a child and which one is unbearable differs enormously from child to child, and bedtime is the worst moment to find out. Sound check in the app's menu does the testing with you during the day: it plays six gentle sounds one at a time, quietly, and you mark the ones your child reacts well to. Up to three are saved together with the music and a Sleep Timer as Custom 1 — then the evening only has to run it, not decide it. It takes about two minutes.
Short samples. The melody leads — even the ambient layer sits softly underneath, never in place of the music.
Try a melody with pink noise underneath — that's the app's sound mixer, in one tap. Every layer starts silent; nothing is chosen for your child in advance.
Steady tempo, no sudden changes, composed in the style of the great masters — written for sleep, not the concert hall.
No clicks, no chimes — nothing beeps or pops up while it plays. A sudden quiet sound matters more here than a loud one.
Recorded once by you, played back whenever it's needed — the one sound only your family has.
Rain, waves, heartbeat, white and pink noise and more — every layer starts silent, each with its own volume.
A soft breathing color, or one still color with nothing moving at all — your choice.
Starts on its own with a preset — 45 minutes, then a 5-minute fade to silence. A shrinking ring shows how much is left.
One tap repeats yesterday's session exactly — same piece, same mix, same volume, same timer.
The main screen and the sound mixer keep their places release after release — a routine that keeps changing shape isn't much of a routine.
No internet needed — reliable at night, on trips, anywhere.
That's the range of autistic children with a sleep disorder, against roughly a tenth to a third of other children — and it doesn't reliably fade with age.
In one clinical trial, autistic children without an intellectual disability rejected white noise outright — the sound most sleep apps push by default.
The average discomfort threshold measured in children and teens seeking help for sound sensitivity — about the loudness of an ordinary conversation.
Why the layers stay separate: a busy sensory system reacts more to a sudden change than to steady volume — a quiet sound at the wrong moment can wake a child who sleeps through a passing car. That's why nothing plays automatically here, why there are no interface sounds, and why every layer fades rather than stops.
Where the evidence stops: no solid research shows that music improves sleep specifically in autistic children — the largest review of music interventions in autism didn't measure sleep at all. Clinical guidance puts routine first, not sound, which is why this app is built around repeating a routine exactly, not around any one track. This is a sleep aid built around calm music and routine — not a therapy or a medical treatment. If your child has ongoing sleep problems, talk to your pediatrician.
Most sleep apps assume a mix that works for everyone. This one assumes nothing until you tell it.
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Calm Sleep for Autism
