Serein: Sleep Sounds & Mixer

Serein is a quiet place to land at the end of the day. Twenty soundscapes, all made from real field recordings — never synthesized — loop seamlessly for as long as you need, with a sleep timer that is always one tap away.

SOUNDSCAPES
Midnight rain, distant thunder, forest stream, ocean dusk, moonlit forest, morning birds, crackling fire, quiet library, night train, cabin in the rain, city at night, a lecture in a classroom, the buzz of a school break, a subway ride, a busy café, an airplane cabin and more. Every scene is built from high-quality recordings and tuned to loop without a seam.

CUSTOM MIX
Layer up to six sounds at once: light or heavy rain, wind, waves, crickets, owls, fans, air conditioners, keyboards, singing bowls, guzheng, piano, pink and brown noise and dozens more. Balance each layer with its own slider, stack a mix on top of a playing scene, and save your favourite mixes for tonight.

SLEEP TIMER
The timer sits in the centre of the player. Pick 15, 30, 45, 60 or 90 minutes, dial in a custom duration, or let it play until you stop. Sound fades out gently so it never wakes you.

MADE FOR SLEEP
• Works fully offline — every sound is bundled with the app
• No account, no sign-in, no tracking of your listening
• Lock-screen and notification controls, plays in the background
• Favourites for the scenes you return to
• Available in English, Chinese, Japanese, Korean, Spanish, French, German and Portuguese

SEREIN PLUS
A subscription removes ads and unlocks every Plus sound in the mixer. Plus sounds can also be unlocked for a day by watching a short video. Serein is free to use without either.

Privacy policy: https://caitty.com/serein-app/privacy
Support: support@caitty.com