ComfySound
Keeps going, screen off.
Your sound plays in the background all night. Everything is on your phone, so there's nothing to stream and no account to sign in to.
BUILT TO PLAY ALL NIGHT
A little quiet.
Whenever
you need it.
Traffic outside. Voices next door. A steady background sound can help mask the distractions, so you can settle into your own little quiet place. ComfySound is designed to keep playing all night, offline and with the screen off, until morning or until your timer gently fades it out.
Android iOS · Store releases coming soon
Plays all night, screen off21 offline soundsMix up to four
Less on your screen.
More room to unwind.
More room to unwind.
Actual Android testing build
PLAYS ALL NIGHT21 OFFLINE SOUNDSMIX UP TO FOURA GENTLE SLEEP TIMER
BUILT FOR THE WHOLE NIGHT
Press play.
Then forget about it.
Many sound apps are fine for a few minutes. ComfySound is designed from the ground up to keep your sound going all night while you sleep, and to stay out of your way when something interrupts it.
Picks itself back up.
A phone call pauses it, and it carries on afterward. If your phone ever stops ComfySound overnight, it starts again with the same mix and timer.
Sound that runs on its own.
Playback runs separately from the screen you see, so closing the app, a busy phone, or an ad never cuts the sound. Recordings reshuffle gently, so there is no loop to notice at 3 a.m.
No loud surprises.
If your headphones disconnect, it pauses instead of playing out loud. Set a timer to fade out gently, or let it play until morning.
On Android, restarting on its own needs unrestricted battery use for ComfySound. The app shows you where to turn it on.
LESS TO TUNE INTO
A steadier backdrop.
For a noisy world.
Mask the distractions.
A consistent layer of sound can make traffic, footsteps, and other passing noises less noticeable in a noisy room.
Make space to unwind.
Choose rain, a familiar fan, or a soft shade of noise, or blend a few. Find a texture you enjoy and let it be your backdrop as you wind down.
Set it. Settle in.
Keep listening with the screen off. Set a sleep timer to fade out, or leave it off and listen at your own pace.
A little about sound masking
Sound masking makes distracting sounds less noticeable by reducing their contrast with a steady background. Its effect depends on the sound, volume, and environment. Sleep research is mixed, so ComfySound does not promise better sleep. Keep the volume low and comfortable. White-noise study ↗ Research review ↗ 2026 findings ↗
FIND YOUR SOUND
Nature. Noise.
A familiar hum.
Water dropsLight rainRainHeavy rainRiverWindCampfireOcean wavesForest birdsNight cricketsThunderRain on tentRain in carWaterfallAirplane cabinTrain rideCat purringWhite noisePink noiseBrown noiseFan
All twenty-one sounds, included free. Ready to play offline.
MAKE IT YOURS
Layer your sounds.
Shape the tone.
Blend a few sounds into your own backdrop, or start from a ready-made scene.
Mix up to four sounds.
Rain with a little wind, a river with distant birds. Each sound gets its own level.
Warm or bright.
Tap the tune icon on any sound to soften hiss or bring out detail, so the mix sits just right.
Presets, ready to go.
Seventeen scenes, from Rainstorm and Thunderstorm to Campfire night, Rainy drive, and Zen garden. One tap, or swipe between them.
Save your favorites.
Name a mix you love and it appears first in your presets. ComfySound also remembers your last mix.
Never the same loop.
Recordings are continuously reshuffled with gentle crossfades and played in stereo, so there's no short loop to notice.
Your phone's volume.
No extra slider to fiddle with. Use your phone's volume buttons, and ComfySound follows.
QUIET BY DESIGN
Pick a sound.
Press play.
A calm screen with one round Play button and a sleep timer right beside it. Tap a preset or swipe between scenes, then fine-tune the mix below. On tablets, playback and your mix sit side by side.
Actual Android testing builds shown (captured on emulators, where no ad loads). In the app, a dark, clearly labeled ad sits at the bottom until you remove ads.
CHOOSE YOUR QUIET
Free to start.
Ad-free if you like.
ANDROID · FREE
A quiet place
to begin.
All the sounds, mixing, and scenes, with a dark, clearly labeled ad at the bottom. Playback never waits on an ad.
Google Play release coming soonONE-TIME UPGRADE
Just you.
And your sound.
Remove ads once, in the app. No subscription. It stays with your Google account, so it comes back on a new phone.
In-app purchase · price at releaseiPhone, too. iOS is coming soon.
Store listings are not live yet. Android is currently in testing; pricing will be announced at release.
ABOUT
Made by
Mark Duppenthaler.
ComfySound is a small, independent app, built to be a calm, reliable sound for winding down. You can find more about me and my other work at mduppes.com ↗