Sereno: White Noise for Sleep

Sereno is a white noise app for sleep and focus. Every sound is generated live on your device, so the white noise, brown noise and rain sounds never loop and never hiccup at 3 a.m. Mix your own sleep sounds, set a sleep timer that fades out gently, and keep it all private and offline.

Sereno is a sleep sounds and white noise machine that creates every sound live on your device, so the rain never loops and the ocean never repeats. Blend dozens of hand-tuned sounds into a gentle background for sleep, focus and calm.

Dozens of sounds, 1000+ blends
Real-time synthesis means sound that never repeats. Start with colored noise (white noise, pink noise and brown noise), rain sounds, ocean, wind, streams, fire, night crickets, fans and more, then layer and tune them into over 1000 unique soundscapes.

Build your own mix
Layer sounds and set the volume, balance and equalizer of every track: thunder over a crackling fire, rain on a tent, or a fan behind soft brown noise. With Pro you can layer as many sounds as you like.

Sleep sounds for every moment
Ready-made scenes for sleep, deep focus, study, relaxation, meditation, nature, reading, travel and more. Save your favorite mixes and come back to them any night.

Gentle sleep tools
A sleep timer fades the sound out softly instead of cutting it off. Sunrise wake swells into birdsong to greet the morning; it plays only while Sereno stays open, so please don't rely on it as your alarm.

Steady sound for focus
White noise, brown noise and pink noise give you an even background sound for work, reading and study, with dedicated focus scenes.

Made to feel calm
A serene, dark-first design with slow, gentle motion and calming themes. Background playback and lock-screen controls keep your sleep sounds within easy reach.

Private by design
No tracking, no ads, no account and no data collected. Everything stays on your device, and Sereno works fully offline.

Free to start, Sereno Pro by in-app purchase
You can use Sereno for free with a selection of sounds and scenes. Sereno Pro is unlocked with an in-app purchase and adds every sound, unlimited layers, all scenes and the tuning controls.

Sereno offers ambient sound for relaxation and focus.

Made for moments like these
• Falling asleep in a noisy apartment or a hotel room
• Steady brown noise for deep work, reading or study
• Bedtime for the whole family with a calm, steady background sound