Poor sleep is common in autistic adults, it shows up in objective measurements, and it is tied to sensory sensitivity. This page sets out what the research supports, what it does not, and why the app is built the way it is. Nothing here is medical advice.
Autistic people aged 15 to 80, against 46.4% of non-autistic people.
Discomfort at ordinary volumes, in a meta-analysis across ages (41%).
Of 288 autistic adults in the UK, of whom 90% slept poorly.
Effect on insomnia in a randomised trial of 163 autistic adults, held for six months.
Each finding below comes with its strength of evidence. Most research on autism and sleep is about children; the studies here are about adults unless stated otherwise.
About 6 in 10 autistic adults report insomnia symptoms
Comparing people aged 15 to 80, poor sleep was reported by 63.7% of autistic people against 46.4% of non-autistic people. The gap was largest in women and at ages 20 to 59; at 15 to 19 and at 60 and over the groups did not differ. A 2026 trial estimates that around 60% of autistic adults have insomnia symptoms. Evidence: moderate.
Longer to fall asleep, less efficient sleep, more waking
A meta-analysis of 42 studies in adults with autism or ADHD found that autistic adults take longer to fall asleep, sleep a smaller share of the time they spend in bed, and wake more often. Evidence: strong (meta-analysis).
631 adults: the more sensitive, the more severe the insomnia
Insomnia severity rose with general and with visual sensory hyper-reactivity. The study was cross-sectional, so it shows that the two go together, not which causes which. Evidence: moderate.
41% hyperacusis across ages; in adults, 40.2% hyperacusis and 35.5% misophonia
A meta-analysis put current hyperacusis in autistic people at 41%, mostly from studies of children. A 2024 doctoral study of 936 adults found 40.2% hyperacusis and 35.5% misophonia in autistic adults. Evidence: moderate; the adult figures come from a dissertation.
288 UK adults: 90% poor sleep, 58% never told a doctor
80% rated what they had tried on their own as not effective, and 41% wanted help without medication. Diagnoses in adults are rising: new autism diagnoses in UK primary care grew by 787% between 1998 and 2018, mostly through better recognition in adults, women and people without an intellectual disability. Evidence: survey.
"The Night is Friendlier" and "It Doesn't Really Work for Me"
Interviews with 12 autistic adults with insomnia produced these two themes. Trust in the person giving advice mattered, and the authors recommend designing help together with autistic adults. Evidence: weak (qualitative), but it shaped the tone of this app: a tool, not a coach.
163 adults, large effect, still there after six months
Cognitive behavioural therapy for insomnia, adapted together with seven autistic adults, reduced insomnia with an effect size of d = 1.02. A clinically meaningful improvement was seen in 37.8% of participants against 11.1% in the comparison group. Evidence: strong (randomised controlled trial). If your sleep problems last, this is the thing to ask a doctor about.
Cochrane review: 10 studies, 708 adults with insomnia
Listening to music improved sleep quality as people rated it (PSQI score about 2.8 points better). Objective measures showed no clear effect, and none of the studies included autistic adults specifically. Evidence: moderate. That is enough to make music the core of the app, and not enough to promise anything.
38 studies, results from better sleep to worse
A systematic review of noise as a sleep aid rated the evidence as very low quality. Evidence: very weak. So in this app noise is an optional layer under the music, never a default.
Three findings point the same way, even though none of them alone is conclusive.
The National Autistic Society's sleep guide for autistic adults lists white noise among the things that may keep you awake. That is a recommendation, not a study, but it is written specifically for autistic adults.
In a 2024 study, 19 autistic adults rated ways of masking noise. Nature sounds such as water and rain ranked above white, brown and other coloured noise. The study was about noise sensitivity in general, not sleep.
Sound therapy for hyperacusis generally prefers pink noise to white because it carries less high-frequency energy, and sometimes filters out everything above about 5 kHz. The app's Soft sound switch does the same filtering to every sound it plays.
No study has tested music or ambient sound for sleep in autistic adults specifically. Everything above comes from general adult populations, from autistic people's sensory profiles, or from guidance. So this app promises an environment and control over it, not a result. It is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. For long-term sleep problems, talk to a doctor.
Instrumental music, background sounds that start at zero, and nothing that talks to you — free for 7 days on Android phones and tablets.
Calm Sleep for Autistic Adults
