Noise for sleep and focus

Dark, brown, pink and white noise, plus rain, ocean and shush. Press play, set a timer, put the phone down.

Every sound is computed in your browser when you pick it, then looped. Each loop is built so its end joins its start exactly, with no click where it repeats, and all sounds are matched in loudness, so switching from brown to white doesn’t jump.

Playback fades in over two seconds and the sleep timer fades out over the last minute, never a sudden cut. Add it to your home screen to use it like an app; it works offline.

Not sure which to pick? Brown and dark are deep and soft, the usual choice for sleep. Pink is balanced, good for focus or masking voices. White is bright and hissy; it masks the most, and some find it harsh.

Using it for a baby? Keep the phone across the room, not in the crib, at a low volume (why).