Slumber Studios

The best sleep sounds apps (and how to pick yours)

By the Slumber Studios team ·

Search “sleep sounds” in an app store and you’ll get hundreds of nearly identical icons. Most of them loop the same few stock recordings. Before naming favorites (and yes, two of the picks below are ours; we’ll be upfront about that), here’s what separates a good sleep sounds app from a moon-themed ad machine. What the evidence says these sounds can and can’t do is a separate question, answered in sleeping with sound.

What matters

  • It plays all night, screen off. Sounds obvious. A surprising number of free apps stop when your phone locks, or worse, wake you with an ad.
  • It works offline. Your sound machine shouldn’t depend on hotel Wi-Fi. Airplane mode is the test.
  • The sound never skips. A loop with an audible seam will snag your drifting brain every single time it comes around.
  • A sleep timer with a fade. Sound that stops abruptly at 2 a.m. can wake you as surely as sound that starts.
  • Real recordings, if texture matters to you. Generated noise is fine for masking; but if you want rain or a fan, recordings of the real thing feel warmer than synthesis.

Our picks, by sleeper

For most people: Deep Sleep Sounds. The biggest library of the bunch, with 400+ sounds spanning nature, calm music, and every color of noise (white, pink, brown, green). The killer feature is mixing: layer rain over brown noise with soft music underneath, each at its own volume. Offline, all-night play, and a baby-soothing section that new parents describe in religious terms. Free gets you 35 headline sounds and two-layer mixes; Premium opens the whole library and stacks up to ten. 19.7 million downloads so far.

For fan sleepers: Bedtime Fan. If the sound you need is specifically a fan, the one you grew up with, this is the specialist tool: real recorded fans (box, desk, large; low, medium, high), works in airplane mode, and free. In the interest of practicing what we preach above: that’s our app, and it’s ad-supported like the ones we just grumbled about. You can pay once to turn the ads off. We wrote a whole post on why fan noise works.

For sounds plus stories: Slumber. Soundscapes are half the picture here. The other half is sleep stories and meditations read slowly by people (how we make our shows). Best if silence isn’t the problem so much as a busy mind that needs somewhere to go.

Honorable mentions that aren’t ours

Fair is fair. myNoise is beloved by tinkerers for its endlessly adjustable generated soundscapes. iPhones have a free built-in option that covers basic white noise in a pinch: Background Sounds, under accessibility settings. And if you’d rather not install anything, our sister site WhiteNoise.com plays free in any browser.

The real answer

The best sleep sounds app is the one that plays your sound, all night, every night, without surprises. Start free, test it in airplane mode with the screen off, and let your ears vote. Ours are on the apps page whenever you’re ready to try them.

One thing worth knowing before you spend anything. When 495 working adults were randomized to app-based sleep sounds, bedtime stories, or a control condition for four weeks, none of the audio arms beat the control on sleep disturbance (Vazzaz 2026). Earlier studies that compared these apps against a waiting list had reported much larger benefits, so a good deal of what those measured looks like expectation. We sell two of the apps above and we would still rather you knew: pick one that is free to try, and if it does nothing for you after a couple of weeks, believe that.

Source: Vazzaz et al. 2026.

Common questions

Do sleep sounds apps improve your sleep?
One four-week trial is worth knowing about before you spend anything. When 495 working adults were randomized to app-based sleep sounds, bedtime stories, or a control condition, none of the audio arms beat the control on sleep disturbance. Earlier studies compared these apps against a waiting list and reported much larger benefits, so a good deal of what those measured looks like expectation. We sell two of the apps in this guide and would still say to pick one that is free to try, then believe the result if it does nothing for you after a couple of weeks.
What should I look for in a sleep sounds app?
It should play all night with the screen off, work offline, and loop without an audible seam, because a seam will snag your drifting brain every time it comes around. A sleep timer that fades out matters too, since sound stopping abruptly at 2 a.m. can wake you as surely as sound starting. If texture is what you want, recordings of real rain or a real fan feel warmer than generated noise.
What is the best free sleep sounds app?
Deep Sleep Sounds is free for 35 headline sounds and two-layer mixes, and Bedtime Fan is free with ads that a one-time payment turns off. Both of those are ours, so weigh them accordingly. If you would rather not install anything, iPhones include a basic option called Background Sounds under accessibility settings, and our sister site WhiteNoise.com plays free in any browser.
Do sleep sounds apps work without an internet connection?
Good ones do, and airplane mode is the test: a sound machine should not depend on hotel Wi-Fi. Deep Sleep Sounds plays offline and all night, and Bedtime Fan runs in airplane mode as well. Plenty of free apps fail here, or stop the moment your phone locks.