What do you need?
Pick a state. The tools adapt.
Focus
deep work · concentration
Sleep
delta · wind-down
Relax
soften · decompress
Meditate
stillness · presence
Flow
creativity · light work
Built for this.
Not repurposed for it.
YouTube / Spotify
General platforms
Audio
Static recordings — the file loops or ends
Binaural beats
Spotify downmixes to mono for loudness normalization — the stereo L/R offset that creates the beat is destroyed
Interruptions
Ads, autoplay, algorithm-chosen "Up next" — each break resets 20 min of neural entrainment
Interaction
Press play, hope for the best — fall asleep to ambient sound, wake up to a documentary about sharks
Screen light
Bright interfaces — white backgrounds, thumbnails, notifications — emit light that suppresses melatonin and strains the cardiovascular system
+OM
Purpose-built
Audio
Real-time synthesis — never loops, never repeats, infinite variation from live oscillators
Binaural beats
Exact Hz, always stereo — the left and right channels are generated independently in your browser, exactly as the neuroscience requires
Interruptions
None — no ads, no algorithm, no notifications. The session runs until you stop it
Interaction
Arc guides you — moves through brain states on a schedule, adapts to where you are in the session
Why it matters
The difference in practice
Variation
The brain habituates to a repeated pattern within minutes. A file that loops stops working. A living signal keeps working.
Stereo integrity
A 40 Hz gamma beat means 420 Hz left ear, 460 Hz right ear. Collapse that to mono and you hear 440 Hz — no beat at all.
Continuity
Entrainment is cumulative. An ad after 18 minutes undoes most of the session. Uninterrupted time is the product.
Intent
A playlist is content. The algorithm's job is to keep you watching — not to bring you down to delta and keep you there. Arc has a target state and moves you through it. Then it stops.
Light & the heart
Even the smallest light source at night disrupts melatonin and raises resting heart rate. The screen is part of the product — so it goes black.
Every sound has
its own intelligence.
+OM is the first soundscape platform where each tool is not a file — it is an agent. An agent that reads the moment and shapes the sound accordingly.
Time of day
The same tool sounds different at noon than at 2 am.
Morning sessions run brighter — higher binaural targets, lighter harmonic weight. Late-night sessions shift toward delta frequencies, lower filter cutoffs, longer modulation cycles. The agent knows what hour it is.
Automatic
Session length
The longer you stay, the deeper it goes.
In the first minutes the sound is welcoming — familiar texture, moderate depth. Past 20 minutes the agent gradually intensifies modulation, narrows the filter band and reduces harmonic brightness to guide the nervous system further down. Entrainment is cumulative. The agent uses that.
Progressive
Frequencies
Exact targets, not approximate moods.
The agent does not pick a frequency range and hope for the best. It holds a specific Hz target — say, 6 Hz theta — and continuously adjusts binaural offset, carrier frequency and harmonic spacing to stay precisely on it as the session evolves.
Precise
Layer balance
Every layer has a reason to be at its current level.
Noise floor, harmonic body, filter sweep, binaural signal — the agent weights them against each other in real time. As session depth increases, the noise floor recedes and the harmonic layer moves forward. The mix is always in motion, never settling into a pattern the brain learns to ignore.
Adaptive
Simple pricing
Start free. Upgrade when you're ready.
Free
Free
limited access
- Arc — Brain State Guide
- Unlimited Arc sessions
- Relax · Focus · Flow · Sleep
- Meditation · Tape · Drone · Noise
- Offline access
- New tools as they ship
All tools
Member
€ 4,90
per month · cancel anytime
- Arc — Brain State Guide
- Unlimited sessions
- Relax · Focus · Flow · Sleep
- Meditation · Tape · Drone · Noise
- Offline access
- New tools as they ship