Brown Noise & White Noise

Brown Noise & White Noise is a sleep sound machine and noise mixer. Tap once to play deep brown noise, or pick any of twelve sounds — seven noise colors plus rain, ocean waves, forest, fan and fireplace — and layer up to three at once. Set a sleep timer, put the phone face-down, and drift off.

MIX YOUR OWN SLEEP SOUND
• Layer up to 3 sounds — rain over brown noise, a fireplace with soft rain, fan with pink noise
• Each layer has its own volume slider, so the rain can sit quietly under the noise
• Save a mix with your own name and start it again in one tap
• Six ready-made mixes to start from: Rainy night, Cozy cabin, Deep focus, Ocean calm, Forest rain, Green study

SEVEN NOISE COLORS
• Brown noise — deep, warm low end for sleep and focus
• Deep brown noise — even darker and softer, with no hiss at all
• White noise — crisp, even hiss that masks sudden sounds
• Pink noise — balanced between white and brown, easy on the ears
• Green noise — a mid-range hush, like a distant waterfall
• Grey noise — shaped to sound evenly loud to the human ear
• Blue noise — bright and airy, for alert focus

NATURE AND HOME SOUNDS
• Rain, ocean waves and forest birdsong
• Electric fan and crackling fireplace

BUILT FOR THE NIGHT
• Sleep timer from 15 minutes to 8 hours — every length is one tap away, and the sound fades out gently over 30 seconds
• Your last timer length and your last mix are remembered for tomorrow night
• Optional bedtime reminder at the time you choose
• Quick Settings tile — start your last sound or mix from the notification shade in one tap
• Plays in the background with the screen off; every sound is stored on your phone, so playback needs no connection
• Lock-screen controls — pause and resume without unlocking; headphones unplugged means the sound pauses instead of blasting from the speaker
• Seamless looping — no gap or click when a sound repeats
• Warm, dark amber interface — no bright photos at 2 a.m.

NOISE COLORS, EXPLAINED
Brown noise has stronger low frequencies — a deep, rumbling sound many listeners find soothing for sleep. White noise spreads its energy evenly and is good at masking sudden noises. Pink noise sits between the two. Green noise concentrates on the middle of the spectrum, around 500 Hz. Grey noise is balanced to how the ear hears loudness, and blue noise leans toward the high end. Mix a color with rain or a fan to find what works for you.

USE CASES
• Falling asleep with a steady wall of brown noise or a rainy-night mix
• Masking snoring, traffic, neighbours or office chatter
• Studying, reading or deep work with brown noise, green noise, fan or forest ambience
• A steady white noise machine for a nursery or a baby's nap
• Light sleepers who wake to small sounds and want a continuous mask all night

NO ACCOUNT, NO SUBSCRIPTION
All twelve sounds, the mixer and saved mixes come with the app. No sign-up and no paywall; the app is supported by ads.

PRIVACY
The app uses Firebase Analytics, Firebase Crashlytics, Firebase Remote Config and Google AdMob for telemetry and ad serving. Sound playback is fully on-device. There is no account, no profile and no audio recording.

Recent changes:
Bug fixes and reliability improvements.