Lullsong
Support

Help and contact

Lullsong plays soft, seamless sounds to help babies drift off. Questions, problems or ideas: write to hello@vesperai.ch and we reply within two working days.

Common questions

The sound stops when I lock my phone

On the free plan, White noise, Rain, Shush, Heartbeat and Music box keep playing with the screen locked. The other free sounds pause when the phone locks. Lullsong Pro keeps every sound playing.

How do I restore Lullsong Pro on a new phone?

Open Lullsong, tap Pro, then Restore purchases. Use the same Apple ID you bought with. With Family Sharing, family members get Pro automatically.

How do I cancel my subscription?

Open the Settings app, tap your name, then Subscriptions, then Lullsong. Cancel at least 24 hours before the period ends to avoid the next charge.

How loud should it be?

Quiet: around 50 dB or less at the crib, about the level of a quiet conversation. Keep the phone at least 2 metres from your baby and never in the crib.

Why does it stop after 30 minutes?

Safety researchers recommend short sessions with an automatic shut-off, so the timer is on by default and fades out slowly. You can choose a longer timer, or all night, in the timer menu.

The research behind Lullsong

Lullsong only says what studies show. Research has measured how fast babies fall asleep with white noise, not whether they sleep longer. Nature sounds, household hums, pink and brown noise are in Lullsong because parents like them; they haven't been studied in babies. Lullsong is not a medical device: talk to your paediatrician about persistent crying or sleep problems.

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  2. Sezici E, Yigit D. Comparison between swinging and playing of white noise among colicky babies: a paired randomised controlled trial. J Clin Nurs 2018;27:593-600. https://doi.org/10.1111/jocn.13928
  3. Bainbridge CM, Bertolo M, Youngers J, et al. Infants relax in response to unfamiliar foreign lullabies. Nat Hum Behav 2021;5:256-264. https://doi.org/10.1038/s41562-020-00963-z
  4. Cirelli LK, Trehub SE. Familiar songs reduce infant distress. Dev Psychol 2020;56:861-868. https://doi.org/10.1037/dev0000917
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  8. De Jong RW, Davis GS, Chelf CJ, Marinelli JP, Erbele ID, Bowe SN. Continuous white noise exposure during sleep and childhood development: a scoping review. Sleep Med 2024;119:88-94. https://doi.org/10.1016/j.sleep.2024.04.006
  9. Moon RY, Carlin RF, Hand I; AAP Task Force on SIDS. Sleep-related infant deaths: updated 2022 recommendations for reducing infant deaths in the sleep environment. Pediatrics 2022;150:e2022057990. https://doi.org/10.1542/peds.2022-057990
  10. Capezuti E, Pain K, Alamag E, et al. Systematic review: auditory stimulation and sleep. J Clin Sleep Med 2022;18:1697-1709. 34 adult studies, n=1,103. https://doi.org/10.5664/jcsm.9860
  11. Basner M, Smith MG, Cordoza M, et al. Efficacy of pink noise and earplugs for mitigating the effects of intermittent environmental noise exposure on sleep. Sleep 2026;49:zsag001. https://doi.org/10.1093/sleep/zsag001

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