Clozzz: Sleep Sounds & Music

Biaohan Limited

In-app purchases

About this app

Sleep like a baby again. Lab-tested, science-backed lullabies made just for you.

Clozzz is an intelligent sleep-aid app that brings together sleep music, modern lullabies, and white noise — personalized to you, and gently evolving as you drift off. Every track is lab-tested and supported by our team's peer-reviewed research, published in top-tier academic journals and conferences.

— Inspired by the Most Effective Lullaby Ever —

The way a mother gently rocks, hums, and quietly fades her voice until a child falls asleep is one of the most effective sleep rituals ever discovered. Two things make it work: it's deeply personal, and it slowly transforms — softer, slower, calmer.

Clozzz is built on that exact logic. Your audio is matched to you, then gradually evolves as you drift off — guiding you into sleep without ever jarring you awake.

— Tailor-Made for You —

No two sleepers are alike. Clozzz uses affective computing to recommend audio based on your personal sound and music preferences — and the specific factors keeping you up at night, from stress and anxiety to noise, lifestyle, and hormones. It's a world away from random tracks or generic white noise.

— Built on Real Science and Lab-Test —

Developed by a team of neuroscience and cognitive-computing scientists, Clozzz is grounded in research on sleep, sound, and the human nervous system — and refined through careful, real-world testing. Behind every track is a blend of music therapy, white noise engineering, and modern acoustic technology.

— Slow, Gentle, Personal —

A signature gradual fade: your soundscape doesn't just play — it slowly drifts with you, adjusting tempo, brightness, and intensity in subtle steps. You won't notice it happening. You'll just notice you're asleep.

— Simple to Use —

One tap starts it. Sleep timers, loops, and gentle fades handle the rest. No clutter. No decision fatigue. Just rest.

Whether you're winding down after a long day, fighting insomnia, calming anxiety, or simply hoping for a quieter, deeper night — Clozzz is the lullaby made for you.

Sleep like a baby again.

What’s new

Updated locale strings.