Sound that supports your mood and delivers deep focus
Underlay.fm checks in on what and how you're doing, then engineers the mix for that exact task and state. No playlists, no decisions, just texture your brain can settle into.
Full Pro features · no account or card required
Engine activity · accelerated view
Best with headphones 🎧
How it works
Two questions, then you're working.
No library to browse and no playlist to assemble. Answer both and the environment is built for you.
Choose what you're doing
Deep focus, light work, reading, creative, journaling. Each one calls for a different environment.
Say how you're feeling
Scattered, anxious, steady, tired, wired. A few seconds of honest self-awareness shapes the whole session.
Launch your soundscape
Layered ambient audio built for that exact combination. Nothing to skip or shuffle. Adjust warmth, depth, and layers without breaking focus.
Under the hood
Tuned to your state, not a preset or a guess.
Two inputs, one generated environment. Here is what each one actually changes in the mix.
Work mode sets the baseline
Every work mode targets a specific binaural frequency, from theta for loose, associative work up through beta for sustained concentration.
Each work mode targets a binaural beat frequency mapped to a brainwave band: Journaling at 6 Hz and Creative Thinking at 7 Hz sit in theta, Reading at 10 Hz and Light Work at 12 Hz sit in alpha, and Deep Focus at 14 Hz sits in beta. Higher frequencies run more alert, lower more relaxed.
Then mood reshapes it
Mood doesn't swap in a different track. It bends that same baseline, changing brightness, drift, and which layers are in the mix at all.
No two sessions are exactly the same
Layers retire and redraw from the stem pool while you work, so the same profile never plays back the same way twice.
In the app
Two screens, and then it gets out of the way.
One to build the environment, one to run it. Everything after you press launch is optional.
Built for
Different work wants a different room.
Each of these maps to a set of work modes, and the engine builds the environment from whichever one you pick.
Coding →
Long stretches without a natural stopping point. Underlay.fm holds the same texture through a whole debugging session so context-switching stays where it belongs, in your editor.
Studying →
Dense reading and problem sets reward a steady background, not a shuffling playlist. Pick your mood, pick a duration, and the room stays quiet in the same way for the whole block.
Writing →
A draft needs your attention on the sentence, not the soundtrack. No lyrics to half-hear, no track change to notice mid-thought.
ADHD-friendly focus →
Built around a real finding: music with melody competes for the same attention ADHD brains are already fighting to hold. Underlay.fm generates no melody at all.
Quick answers
The questions that come up first.
Is this music?
No. Underlay.fm generates layered ambient texture, not songs. There is no melody, rhythm, or lyrics to track, which is the whole point.
Does it work on phone or laptop speakers?
Yes. The stems are mixed and filtered specifically so the low end still reads on small speakers. Headphones are still the best experience, and binaural beats only work through them, but nothing else breaks without them.
What do I get for free?
One full session a day, up to 45 minutes, with every Pro feature unlocked. No account needed to try it once.
How much is Pro?
$4/month billed annually, or $7.99 month to month. Unlimited sessions, binaural beats, and longer durations.
So focused you forget you're listening.
Texture, not music
No melody or rhythm for your brain to follow. Built to support, not entertain.
Mood-aware
Focus audio that actually asks how you're feeling before it plays anything. Your starting baseline matters.
Designed, not curated
Synthesized ambient stems layered in real-time, with subtle shifts and oscillations that keep the texture alive without demanding your attention.
Pricing
Free
A session every day, up to 45 min. All work modes. No card required.
Pro
Unlimited sessions up to 8 hours, binaural beats, Pomodoro cycles.
or $7.99 month-to-month · see all plans
Full Pro features · no account or card required
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