Rain and Brown Noise for Deep Sleep
A low, steady foundation softened by the natural detail of rainfall.
- Brown Noise 65%
- Rain 38%
Best Sleep Sound Apps in 2026: 6 Honest Picks
Disclosure: Slo is made by the team behind this guide. We checked official product and support pages on July 31, 2026. No app in this list can guarantee better sleep.
Slo is a sleep sounds app for iPhone, Android and Mac with free browser players and a mixer at slonoise.com; the bedtime case it handles best is a quiet layered mix, rain over brown noise for example, with a timer so the sound stops on its own. Choose White Noise by TMSOFT for a traditional noise machine with alarms and recording; BetterSleep for a large mixer plus tracking and stories; Calm for polished guided content; Endel for adaptive generated audio; or Apple Background Sounds for basic playback without another app.
Quick comparison
| Pick | Best for | Sound workflow | Verified platforms | Cost note |
|---|---|---|---|---|
| Slo | Manual ambient layers | Presets, individual layer volume, saved mixes | iOS, Android, Mac; browser tools | Check the current store |
| White Noise by TMSOFT | Noise-machine features | 50 bundled sounds, Mix Pad, alarms, recording | Mobile, Mac, Windows and more | Free Lite; one-time paid editions |
| BetterSleep | Broad sleep toolkit | Large mixer, stories, meditation and tracking | iOS, Android | Free download; optional plans |
| Calm | Guided bedtime content | Soundscapes, music, meditation and Sleep Stories | iOS, Android, web | Selected free content; Premium library |
| Endel | Adaptive sound | Real-time generated soundscapes | iOS, Android, Mac, web and more | Subscription; check current offer |
| Apple Background Sounds | Built-in basic playback | One ambient sound with related controls | iPhone, iPad, Mac | Included in supported software |
We weighed sound control, bedtime-specific tools, platform access and clarity of current product documentation. We did not use ratings, invented hands-on tests or a company’s sleep claims as proof of an outcome.
1. Slo: best for direct sound mixing
Slo’s curated library covers noise colors, nature audio and atmospheric textures. Each mixer layer has its own volume, and curated presets offer a quick starting point. Browser players add volume and timer controls; app download routes cover iOS, Android and Mac.
Best for: People who want a small, repeatable soundscape rather than stories or sleep tracking.
2. White Noise by TMSOFT: best noise-machine replacement
TMSOFT documents local playback of 50 stock sounds, a Mix Pad, fade timers, alarms, recording, playlists and community Market downloads. Lite is free and ad-supported, while Full and Pro are one-time purchases with different tools.
Best for: People who want alarms, their own recorded loops or broad device support.
3. BetterSleep: best all-in-one sleep toolkit
BetterSleep’s current support pages describe more than 500 sounds and melodies, over 100 SleepTales, meditations, a timer, bedtime reminders, tracking and a sleep recorder. The mixer supports multiple sounds plus music and a brainwave track.
Best for: Someone who wants sleep content and tracking around an ambient mixer.
Consider: If you only need one noise sound, much of the product may be unnecessary.
4. Calm: best guided sleep library
Calm provides soundscapes, music, meditations and Sleep Stories across iOS, Android and web. Its help center documents 300+ Premium Sleep Stories and a smaller selection of free Stories and background Scenes.
Best for: People who value narration and guided content more than detailed sound mixing.
Consider: Exact pricing varies by region and channel, so check the current offer rather than an old annual figure.
5. Endel: best low-decision adaptive audio
Endel generates audio in real time and can adapt to inputs such as time, weather, light, motion or heart rate, depending on the device and permissions. Its official site lists a Sleep mode and broad platform availability.
Best for: People who prefer an evolving soundscape without balancing layers.
Consider: If audible changes wake or distract you, choose a stable loop or noise generator.
6. Apple Background Sounds: best built-in option
Apple’s Background Sounds feature plays ambient soundscapes on iPhone, iPad and Mac. Apple documents volume, equalizer and stop-timer controls on supported versions.
Best for: A basic steady sound with no extra account.
Consider: It is not a full sleep library or multi-layer mixer.
Sleep presets
Compare two low-complexity mixes
Use the timer, keep playback comfortable and remove any layer that makes you listen actively.
How to evaluate a sleep sound app
- Match the problem: A steady sound can mask intermittent room noise. It cannot fix every cause of poor sleep.
- Keep controls simple: You should be able to start a saved sound in a few taps with the screen dim.
- Check timer and offline behavior: Test both before travel or bedtime.
- Watch the volume: Use only enough level to soften the distraction. If you need to raise it sharply, change the placement or sound instead.
Read how to create a sleep soundscape for a step-by-step setup.
Frequently asked questions
What is the best app for sleep sounds?
Slo fits manual ambient mixing; TMSOFT fits a traditional noise machine; BetterSleep and Calm fit wider sleep-content needs; Endel fits adaptive audio; Apple Background Sounds fits basic built-in playback.
Are sleep sound apps safe to use all night?
Keep playback at a comfortable level and use a timer if sound is only needed while settling down. Device placement matters too: avoid putting a loud speaker close to your head. Ask a qualified clinician about persistent sleep or hearing concerns.
Which noise color is best for sleep?
There is no universal winner. White noise sounds brighter, pink noise is softer, and brown noise emphasizes lower frequencies. Compare the noise colors at similar levels.
Sources checked July 31, 2026
- TMSOFT White Noise
- BetterSleep current offering, getting-started guide and pricing guide
- Calm sleep content, free content and available apps
- Endel product overview and technology/platform details
- Apple Background Sounds
- Slo product-facts ledger and website player/mixer source reviewed July 31, 2026
Related guides
Explore more sounds in Slo
Stack two or three sounds, keep the blend, and let the timer stop it. Slo, on iOS, Android and Mac.
