Brown Noise: Rain & Fan Sounds

Brown noise, white noise, rain sounds and fan noise for focus or for sleeping, made live on your phone so there is no loop seam, and it keeps playing through the night. What is free: - White, pink, brown and green noise, a fan and rain, generated as they play - Mixes of two layers, each with its own volume and tone - Three saved mixes - A sleep timer with a long, slow fade - Background playback with lock-screen controls - A widget that resumes your last mix with one tap - Export and import of your mixes as a file What the one purchase adds: - Up to six layers in a mix - Unlimited named mixes - Storm with thunder, wind, surf, stream, fire, air conditioner and train - Crickets and cafe murmur - Evolving night: intensity drifts slowly, so no two hours sound alike - A Quick Settings tile Free to use. One optional purchase unlocks everything, once, for good. No ads, no subscription, no account. Works fully offline. It keeps going. Rainfold plays through a media service built for long playback and holds steady while the phone sits idle. It pauses for calls, then picks up again, and pauses when headphones are unplugged. There is no seam. Every sound in Rainfold is synthesised as it plays, not looped from a short file, so nothing clicks or restarts. The Fold shows your mix as stacked bands, one per layer, each edged with its own spectrum. Drag a band up or down for volume and sideways for tone. For focus and noise masking: cover office chatter, traffic or a humming fridge while you read, study or rest. Screenshots marked as part of the unlock show features the purchase adds. Buying or restoring the unlock goes through Google Play and needs a connection once. After that everything works offline. The unlock belongs to the Google account that bought it and comes back on a reinstall or a new phone. The app has no internet permission and collects nothing. Rainfold is a sound app, not a medical device, and makes no health claims.