Focus & ADHD
Brown, Pink or Green Noise for ADHD Focus: What the Research Says
Brown noise went viral in ADHD communities. Here is what the studies actually show, and a simple way to find the noise that works for you.
Focus sounds for iPhone
Focus sounds and noises for ADHD brains
Solbox pairs a Pomodoro timer with brown, pink and white noise, body doubling ambience and calm soundscapes. One tap to focus, no ten-tap menus, and it plays alongside Spotify.
- 15 noise colors and textures
- Pomodoro on your Lock Screen
- Café and office body doubling
Free on iPhone · iOS 17.6 or later
One tap to focus
A Pomodoro timer with sound built in
Tap Focus and Solbox starts your sound, your volume and your timer. Pick 25/5, 50/10 or 90/20 and the countdown sits on your Lock Screen and Dynamic Island, so you never have to open the app to check it.
- 25/5, 50/10, 90/20 or custom intervals
- A gentle chime when a break starts and ends
- Live Activity with pause and resume
Noise colors
Brown, pink, white, green and grey noise
15 noises in all: the classic colors plus warm and bright Solbox textures. Brown noise is the deep rumble many ADHD brains love; pink and green are softer; white covers the most.
Body doubling
Work alone, without feeling alone
Body doubling means working next to someone else to get started. Solbox recreates the feeling with café, office, keyboard and pencil ambience, so a quiet room feels like a shared desk.
Soundscapes
Layer your own soundscape
Mix rain, forest, ocean, thunder, birds and fire on top of any noise. Every layer loops with no audible gap, and each one has its own volume.
Tones & binaural beats
Binaural beats and solfeggio tones, without the hype
27 binaural presets from delta to gamma, isochronic mode for speakers, and pure solfeggio tones from 396 to 852 Hz. They are listening options, not medicine.
Wind down
Sleep sounds that fade out on their own
Set a sleep timer up to almost nine hours and Solbox fades the sound out slowly, so you wake up to quiet instead of a sudden cut-off. Pair brown noise with soft rain and a singing bowl.
And more
Small details that keep you in the zone
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Haptic sync
Optional, subtle vibrations in time with your audio.
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3D Audio
Bilateral, Orbit, Figure 8 and Breathing motion, with AirPods head tracking.
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AI sound effects
Type "crickets under a summer sky" and hear it in seconds.
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Plays with other apps
Keep Spotify, YouTube or a podcast going with noise underneath.
Inside the app
A calm, dark app that gets out of your way
Reviews
What listeners say
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5 out of 5 stars
The only thing that works for my ADHD
I've tried every productivity hack, every timer app, every focus playlist on Spotify. The binaural beats are different - it's like my brain finally has something to lock onto. Beta 18 Hz is my daily driver now.
Viking25891 · App Store review, Ukraine, -
5 out of 5 stars
From 5 distracted minutes to 30 effortless ones
I always wanted to meditate but my mind wouldn't shut up. With the binaural beats, I stopped fighting it. The sound gives my brain something to follow instead of chasing thoughts. I'm at 30-minute sessions now and it doesn't feel long
mrina_tekuchova · App Store review, Ukraine, -
5 out of 5 stars
Amazing app!
Thanks for making it! Friends told me about it and i use it when putting my baby to sleep.. works like a charm!
Lora Chan 82 · App Store review, Israel,
Free vs Pro
Start free, upgrade if it clicks
Solbox is free to download with a starter set of sounds. Solbox Pro unlocks the whole library and the advanced audio features.
| Feature | Free | Pro |
|---|---|---|
| Pomodoro 25/5, 50/10, 90/20 and sleep timer with fade-out | ||
| Brown and blue noise, 396 and 417 Hz tones | ||
| 3 binaural presets: Deep Sleep, Calm Relaxation, Deep Focus | ||
| Rain and forest layers, singing bowls, 1 AI sound | ||
| All 15 noises, all 7 tones, all 27 binaural presets | ||
| All 16 soundscapes and 6 body doubling ambiences | ||
| Isochronic mode, 3D Audio and playing over other apps | ||
| Custom Pomodoro intervals and favorites |
Solbox Pro is available weekly, yearly or as a one-time lifetime purchase through your Apple Account. The App Store shows your local price and any trial before you buy, and you can cancel any time in Settings.
FAQ
Questions about Solbox
What is Solbox?
Solbox is an iPhone app of focus sounds and noises with a Pomodoro timer built in. It has noise colors like brown, pink and white noise, body doubling ambience such as a coffee shop or an office, nature soundscapes, binaural beats and solfeggio tones, plus a sleep timer that fades out.
Is Solbox made for ADHD?
Solbox was designed first for ADHD brains, with one-tap Focus, no long setup and sounds that give your attention something steady to hold on to. It is a listening tool, not a treatment, and it works just as well for anyone who finds silence distracting.
Which noise color is best for focus?
There is no single best color. Many people with ADHD prefer brown noise because it is deep and soft; pink noise is a gentle middle ground; white noise masks the most background chatter. Try each for a full Pomodoro block and keep the one you forget is playing.
Do I need headphones for binaural beats?
Yes, binaural beats need headphones because each ear hears a slightly different tone. If no headphones are connected, Solbox automatically switches to isochronic tones, which work through speakers.
Which Pomodoro intervals does Solbox have?
Solbox has 25/5, 50/10 and 90/20 presets, and with Solbox Pro you can set your own work length from 5 to 120 minutes and breaks from 1 to 30 minutes. It runs 4 cycles by default and plays a gentle chime between blocks.
Can I play Solbox with Spotify or YouTube?
Yes, with Solbox Pro. Backdrop mode keeps Solbox playing alongside Spotify, YouTube and podcasts instead of pausing them, so you can have brown noise under your music.
Is Solbox free?
Solbox is free to download and includes the Pomodoro and sleep timers, brown and blue noise, two solfeggio tones, three binaural presets, free soundscapes, the singing bowls and one AI sound. Solbox Pro unlocks the full library, isochronic mode, 3D Audio, Backdrop mode and custom Pomodoro intervals.
From the blog
Guides for better focus sessions
Noise colors, body doubling and Pomodoro for ADHD, explained with sources.
Focus & ADHD
Pomodoro for ADHD: 25/5 vs 50/10 vs 90/20 (and When to Go Custom)
The classic 25-minute block isn't sacred. Here is how to pick, and adjust, Pomodoro intervals for a brain that starts slow and then won't stop.
Binaural & tones
528 Hz: What It Is, Why People Listen, and What the Evidence Says
528 Hz is everywhere, from meditation playlists to sleep videos, usually with very big promises attached. Here is the calm, honest version.
Give your brain something to hold on to.
One tap, one sound, one timer. Free on iPhone.