Sleep Only - Curated Sounds

Relaxing audio for sleeping

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

Sleep Only turns your bedroom into a sleep sanctuary. White noise, fan sounds, rain, and ocean waves, composed in real time to help you fall asleep faster, stay asleep longer, and wake up more rested. Built by Adaptive Sound Technologies Inc. (ASTI), the team behind LectroFan(TM) and Sound+Sleep, Sleep Only holds the SleepMark(TM) 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 sleep, relax, and unwind better. Choose from a curated library of sleep-promoting sounds: white, pink, brown, and green noise, fan sounds, nature and water compositions, lullabies, and 40 Hz therapy beats. The catalog draws from ASTI's acclaimed LectroFan and Sound+Sleep collections, plus sounds built specifically for Sleep Only. 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. On mobile, the adaptive feature now covers the entire catalog, up from a limited set previously available only on ASTI's Sound+Sleep hardware. Non-looping audio: Most sound machines and apps repeat the same loop all night. Every category in Sleep Only, except lullabies and 40 Hz therapy beats, plays without repeating. Expertly mastered sound: Our audio team built each composition to promote relaxation 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. FEATURES - Non-looping, high-fidelity sound compositions generated in real time on your phone or tablet - Patented Adaptive Sound Technology that reads your room and adjusts automatically (Premium) - 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 - Over 35 non-looping, high-fidelity sounds across Noises and Fans - Shut-off timer Premium - 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 Terms of Service: https://www.soundofsleep.com/app-terms Privacy Policy: https://www.soundofsleep.com/app-policy

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Metadata update. Subscriptions rework, new design, bug fixes.

Version 1.2.1

The developer, Adaptive Sound Technologies Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

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    • Usage Data

  • Data Linked to You

    The following data may be collected and linked to your identity:

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    • Diagnostics

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

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Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
Adaptive Sound Technologies Inc.
Size
100.1 MB
Category
Health & Fitness
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • iPad
    Requires iPadOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
Languages
English and 10 more
  • English, Dutch, French, German, Italian, Japanese, Korean, Polish, Portuguese, Simplified Chinese, Spanish
Age Rating
4+
In-App Purchases
Yes
  • Premium Subscription Monthly $4.99
  • Standard Monthly Subscription $2.99
  • Learn More
Copyright
© 2026 Adaptive Sound Technologies, Inc.
  • Developer Website
  • Privacy Policy

    • More by Adaptive Sound Technologies Inc.

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