Acalanto

Sleep better tonight. Acalanto is a sleep-sounds app - completely free, with no ads and no data collection of any kind.

RAIN, YOUR WAY Build your perfect rainy night: from a fine drizzle to a full storm, with thunder as strong and frequent as you like, wind in the trees, birds, crickets and little surprises of nature.

A CRACKLING FIREPLACE Logs crackling on a cold night, with rain on the window if you like.

NOISE THAT LULLS White, pink and brown noise, loudness-calibrated - deep brown noise is the sleep favorite, great for babies too.

ASMR, YOUR WAY Build your own ASMR: nail tapping, whispers, cat purring, brush, book pages, rain on an umbrella and more. With headphones, the sounds slowly drift between your ears.

BINAURAL BEATS Delta (3 Hz) and Theta (6 Hz) with headphones, to accompany relaxation and deep sleep.

MOTION SICKNESS RELIEF Based on Nagoya University research (Japan, 2025): 1 minute of a 100 Hz tone stimulates the inner ear and reduces nausea and dizziness. One button, one minute, safe travels.

MADE FOR BEDTIME

Sound keeps playing with the screen locked
Sleep timer (15 min to 4 h) with gentle fade
Your settings are always remembered
Works 100% offline
No ads, no accounts, no data collection - ever

First release: customizable rain, fireplace, custom ASMR, colored noise, binaural beats, motion-sickness relief (100 Hz) and sleep timer.