Guides
Straight answers about sleep sounds
What the noise colors really are, how loud is too loud for a baby, and why your sleep app keeps stopping at 2 a.m. No medical claims, no fluff, sources linked.
Start here
Brown noise for ADHD and what the research actually says
The brown noise trend is ahead of the science. What studies on white noise and ADHD actually found, and how to try noise for focus sensibly.
Hatch app alternatives if you would rather skip Hatch+
What Hatch+ costs, what your Hatch still does without it, and three ways to get sleep sounds without a yearly subscription.
How loud should white noise be for a baby? What the study found
A 2014 study measured 14 infant sleep machines at three distances. Here is what it found, what the AAP does and doesn't say, and how to set volume at home.
Should white noise play all night? For babies and adults
Why white noise usually works best when it keeps playing, what the research on infant sound machines actually says, and how to taper off later.
White noise apps with no ads and what to check first
What to check before you pick a white noise app, and how 10 popular apps compare on ads, subscriptions and tracking as of October 2026.
White noise machine vs app for baby, bedroom and travel
A fair look at dedicated sound machines and phone apps, plus how to turn an old phone into a sound machine you never have to touch.
White noise vs brown noise vs pink noise for sleep, compared
White, pink, brown and grey noise explained in plain terms, with a comparison table and a simple 3-night test for finding the one you sleep with.
Why your white noise app stops playing in the middle of the night
The real reasons sleep sounds go quiet at 3 a.m., from battery savers to ads and forgotten timers, and how to fix each one on iPhone and Android.
YouTube, Spotify or Alexa for white noise? What fails overnight
YouTube, Spotify and Alexa all play white noise for free. Here is what each does well, and what tends to go wrong at 3 a.m.
Sleepy Noise for iPhone and Android
Take it to bed with you
The browser player is good for trying sounds. For a whole night with the screen off, the app keeps playing through calls and alarms, starts from your lock screen in one tap, and never shows an ad.
- Free core sounds, no ads, ever
- Plays all night with the screen off
- Lifetime is $9.99 once, not a subscription
