Sleep Only - Curated sounds

Adaptive Sound Technologies, Inc.

In-app purchases

About this app

Sleep Only is a noise machine app built to improve your sleep quality, right from your phone or tablet. Fall asleep fast with white noise, fan sounds, water sounds, and other sleep audio, composed in real time so nothing repeats and nothing gets in the way of a full night's rest.

Built by Adaptive Sound Technologies Inc. (ASTI), the team behind LectroFan™ and Sound+Sleep, Sleep Only holds the SleepMark™ designation for meeting National Sleep Foundation guidelines on product design, evaluation, and documentation. An independent study by SleepScore Labs found that Sleep Only helps users fall asleep faster, spend less time awake, and enjoy better sleep quality overall.

Choose from a curated library of white noise, pink noise, brown noise, and green noise, fan sounds, nature and water sounds, relaxing music for lullabies, and 40 Hz therapy beats. Whether you need a noise machine to mask a noisy street or relaxing music to wind down before bed, Sleep Only has a sound built for it.

WHY SLEEP ONLY IS DIFFERENT

Adaptive Sound Technology (Premium): Sleep Only is the only sleep sound app that automatically adjusts volume and sound content based on the noise in your room. The adaptive feature covers the entire sound library, so your sleep audio adjusts in real time as your room changes overnight.

Non-looping audio: Most noise machine apps repeat the same loop all night. Every category in Sleep Only, except lullabies and 40 Hz therapy beats, plays without repeating, so your white noise or fan sounds stay steady from lights-out to sunrise.

Expertly mastered sound: Our audio team built each composition to promote relaxation, stress relief, and sleep, tested and refined for quality most sound apps skip.

A calm, focused interface: No busy dashboards or gamified streaks, just the sounds you need to fall asleep.

Real privacy: Sleep Only is ad-free and notification-free. We don't track, record, or sell your data.

Whether you turn to Sleep Only for stress relief after a long day or as a nightly noise machine to protect your sleep quality, the library adapts to what you need.

FEATURES

- Non-looping, high-fidelity sleep audio generated in real time on your phone or tablet
- Patented Adaptive Sound Technology that reads your room and adjusts automatically (Premium)
- White noise, fan sounds, water sounds, nature compositions, lullabies, and relaxing music in one library
- A simple, distraction-free sound catalog with a customizable favorites list
- A shut-off timer you can set to the exact hour and minute, up to 23 hours and 59 minutes
- 11 language options: English, French, Spanish, Portuguese, Dutch, German, Italian, Polish, Korean, Japanese, and Chinese
- Bluetooth support for your speaker of choice
- No internet connection required after the first download

SUBSCRIPTIONS

Standard ($2.99/month)
- Over 35 non-looping, high-fidelity sounds across Noises and Fans
- Shut-off timer

Premium ($4.99/month)
- Over 120 high-fidelity sounds across six categories: Noises, Fans, Nature, Water, Lullabies, and Other
- Shut-off timer
- Patented Adaptive Sound Technology, with control over minimum and maximum volume, ramp rates, and microphone sensitivity

Try Sleep Only risk-free for 14 days. The trial does not auto-subscribe when it ends. If you subscribe afterward, your plan renews monthly until you cancel, which you can do anytime from the app's account page.

Download Sleep Only and fall asleep fast with sound built to work.

Terms of Service: https://www.soundofsleep.com/app-terms
Privacy Policy: https://www.soundofsleep.com/app-policy

What’s new

bug fixes