Web tool or mobile app?

Use both. Most people start on the web and download the app once they decide binaural beats actually work for them. The web tool isn't a stripped-down demo — it runs the same real-time 48 kHz audio synthesis engine as the mobile app, with the same live carrier and beat-frequency control. What it lacks is breadth: 4 presets instead of 40, no ambient sound layering, no offline playback, no haptic or visual entrainment, no Breathwork Lab.

The mobile app exists for three reasons: the library (40 presets across sleep, focus, meditation, memory, recovery, and clinical-inspired modes), the sensory stack (audio + haptic phone-vibration + visual screen pulses + synced breathwork), and the offline/privacy story (no accounts, no tracking, no analytics, fully on-device). If you only use binaural beats occasionally at a desk, the web tool is enough. If you use them several times a week — and especially for sleep, anxiety, or focus protocols — the app is built for that workflow.

Neither requires payment to start. The web is fully free. The app is free with a premium tier that unlocks via 3 ad views (3 hours premium) or a one-time in-app purchase.

The table tells the story plainly: the audio engine itself is identical. The differences sit in the library, the lab tools, and the sensory and workflow layers built around the engine. If a row says "Yes" on web, the app has it too. The only column where web has something the app doesn't is universal browser access — useful when you're at a borrowed computer or just want to send a friend a link.

If you're scanning this table to decide, the rows that matter most for typical users are: presets (4 vs 40), ambient sounds (none vs 31), offline playback, and the Breathwork / Pomodoro / AI layers. Power users will care more about the 8 lab tools and waveform/sweep control.

Best for: First-time triers, ad-hoc desk sessions, sending a quick demo link, experimenting with frequencies without installing anything.

The free web generator at /generator.html is the lowest-friction way to experience binaural beats. There is no signup, no install, no email collection, no app-store prompt. Click the link, put on headphones, press play. You get four calibrated presets covering the core brain states:

• Deep Sleep Delta — slow delta carrier for sleep induction
• Calm Focus Alpha — alpha range for relaxed concentration
• Deep Meditation Theta — theta band for meditative and creative states
• Gamma Primer — gamma exposure for short cognitive priming sessions

Underneath the presets is a live, real-time frequency engine. You can change the carrier (the audible pitch, e.g. 200 Hz to 250 Hz) and the binaural beat frequency (e.g. 10 Hz to 6 Hz) on the fly, and the audio rebuilds in real time. This is unusual for free web tools — most of what you find on the open web is pre-recorded MP3 or YouTube content where you cannot change anything. The web generator runs the same 48 kHz synthesis path the mobile app uses, so the audio you hear in the browser is the same quality you would get from the app.

It is genuinely useful for three things:

1. Confirming binaural beats work for you. Not everyone perceives the beat strongly — sensitivity varies by person and by headphone quality. Ten minutes with the alpha preset is enough to decide.
2. Quick experimentation. Slide the beat frequency from 6 Hz up to 14 Hz and feel the difference between theta and alpha states.
3. Sharing a demo. It is one URL. Anyone on any device with headphones can try it.

Honest limits. The web tool has no ambient sound layering — binaural beats alone can feel sparse and clinical, and most people find rain, brown noise, or a singing bowl underneath makes a session much more usable. There is no offline playback, so a flaky connection breaks the session. There is no haptic or visual entrainment layer, no Breathwork Lab, no Pomodoro timer, no AI recommendations. Browser audio also has minor limitations around background playback when other apps are active.

If you find binaural beats useful, you will quickly want more variety than four presets, and you will want to be able to use them on the train, on a flight, or with your phone in your pocket. That is the moment to download the app.

Best for: Anyone using binaural beats more than a couple of times a week, anyone with a specific protocol in mind (sleep, ADHD focus, EMDR, memory training), and anyone who wants the sessions to work offline.

The mobile app is not a bigger version of the web tool — it is a different product built around the same audio engine. Here is what you actually get on top of the four-preset web baseline.

40 presets vs 4

The app's library covers the same core brain states the web does, plus a wider set of evidence-anchored protocols:

• MIT 40 Hz GENUS protocol (gamma stimulation studied for cognitive support)
• Schumann Resonance 7.83 Hz
• Memory Boost (Theta-Gamma Cross-Frequency Coupling)
• EMDR-inspired bilateral stimulation
• SMR (sensorimotor rhythm) for ADHD-style focus
• HRV Coherence training
• Power nap induction
• Tinnitus relief protocols
• Sports recovery
• Flow state
• Neuroplasticity boost
• Plus core sleep, anxiety, deep work, and meditation presets across delta, theta, alpha, beta, and gamma bands

31 ambient sounds across 7 categories

You can layer ambient sound underneath any binaural session. The categories:

• Nature — rain, ocean, forest, birds, thunder
• Noise generators — white, pink, brown, green, violet
• Meditation aids — singing bowl, crystal bowl, Om chant, solfeggio 528 Hz
• Water — river, waterfall, underwater
• Fire — campfire
• Music — lo-fi
• Environments — cafe, train, fan

For most users, ambient layering is the single biggest jump in session quality over the web tool. Brown noise under a delta sleep session, rain under a theta meditation, or a quiet cafe under an alpha focus session — these combinations are widely reported to feel more usable than dry binaural beats alone.

8 Advanced Lab Tools

1. Custom frequency generator with real-time oscilloscope visualization
2. Waveform selector — sine, square, triangle, sawtooth
3. Multi-stage frequency sweep designer with a visual timeline editor for building sessions that move between states
4. Multi-layer mixer — binaural + ambient + noise running simultaneously with independent levels
5. Frequency calculator with 10 built-in presets
6. Isochronic pulse tone generator with real sinusoidal amplitude modulation (an alternative to binaural beats that works through speakers)
7. Memory Boost mode using Theta-Gamma Cross-Frequency Coupling
8. EMDR bilateral stimulation mode

These are the features power users and biohackers come to the app for. None of them exist in the web tool, and most are absent from competing apps.

Multi-Sensory Entrainment

The app can drive audio, haptic phone-vibration synced to the beat, visual screen pulses, and breathwork pacing in parallel. For users who do not strongly perceive audio-only binaural beats, the haptic and visual layers give the brain additional entrainment cues. This is the single feature most often called out in app reviews.

Breathwork Lab

Guided 4-7-8 breathing for sleep, box breathing for focus, and coherent breathing for HRV — each with haptic feedback marking the inhale-hold-exhale cycle. Breathwork pairs naturally with binaural meditation, and having both in one app means you can run them simultaneously.

Pomodoro Focus Timer

Automatic binaural switching: Beta during focus blocks, Alpha during breaks. You set the work and break lengths, and the app handles the brain-state transitions for you. It is the most direct way to combine binaural beats with an actual productivity workflow.

AI Session Recommendations

The app suggests sessions based on circadian timing across 6 time-of-day periods (early morning, morning, midday, afternoon, evening, night). It also learns from your effectiveness ratings, so its suggestions improve over weeks of use.

Offline + Privacy

No accounts. No tracking. No analytics. No data collection. Everything runs on-device, including your session history and any custom presets. The app works fully offline once installed — useful for flights, commutes, and anyone who does not want a "sleep audio" app phoning home. WAV export is available so you can save sessions you've built.

"I've never tried binaural beats — where do I start?"

Start on the web. Open /generator.html, put on a decent pair of headphones (not laptop speakers — binaural beats require stereo separation between ears), and try the Calm Focus Alpha preset for 10 minutes during a task you would normally do anyway. If you feel a subtle shift in attention or relaxation, that is your sensitivity test passing. Then try Deep Meditation Theta for 10 minutes with your eyes closed. If both produce something noticeable, download the app for the full library and the ambient sounds. If you feel nothing across two preset types and two sessions, binaural beats may not be a strong fit for you — about 20-30% of people don't perceive the effect strongly, and that's fine. The web's four presets are a fair sample to make that call.

"I use binaural beats a few times a week — do I need the app?"

Almost certainly. Four presets get repetitive fast, and the lack of ambient layering means dry beats start feeling clinical. The app's 40 presets + 31 ambient sounds + offline playback are aimed precisely at users in this band. The Breathwork Lab and AI recommendations also pay back over weeks of use — they're not impressive in a 60-second demo, but after a month of effectiveness ratings the suggestions start landing well. If you use binaural beats for sleep specifically, the offline playback alone is worth installing the app for, because it means no buffering, no autoplay surprises, and no draining battery on a wifi connection while you sleep.

"I'm a power user / biohacker — what's the app's unique value?"

The 8 lab tools and the multi-sensory entrainment stack. Theta-Gamma CFC for memory consolidation, EMDR bilateral for trauma-adjacent protocols, the multi-stage frequency sweep designer for building custom session arcs, the multi-layer mixer for stacking binaural + ambient + noise with independent gain, and the isochronic generator with real sinusoidal AM (most apps fake isochronic with on/off pulses — this one uses proper amplitude modulation). Combined with haptic + visual entrainment and WAV export, this is a serious tool surface. None of it exists in the free web version, and most of it isn't in paid competitors either.

Both the web tool and the mobile app are free to use. The web has no premium tier and no upsell — what you see is what you get.

The mobile app has a free tier and a premium tier:

• Free tier: All 40 presets, all 31 ambient sounds, all lab tools, full audio engine. Limited number of saved custom presets. Ad-supported.
• Premium tier: Unlimited custom presets, ad-free, full feature access. Two ways to unlock: - 3 ad views = 3 hours premium. Watch three short ads and you get a three-hour premium window. This is structured so engaged users can earn premium time without paying. - Direct in-app purchase. A one-time payment unlocks premium without ads.

The deliberate point of the pricing model is that the core experience — 40 presets, 31 ambients, the engine, the labs — is fully available in the free tier. Premium is about unlimited custom-preset storage and removing the ads, not about gating the science. If you only use built-in presets, you can use the app indefinitely without paying.

There is no subscription. The app does not auto-renew anything. The web tool has no payment surface at all.

The mobile app is built privacy-first. It does not collect personal data. It does not share data with third parties. It does not track listening history off-device. It does not require an account. It does not contain analytics SDKs in the listening flow. Session history, effectiveness ratings, and any custom presets you build stay on your device. If you uninstall the app, the data goes with it — there is no cloud account to clean up.

This matters more than it sounds. Binaural-beat use overlaps with sleep, anxiety, focus difficulty, and meditation — categories that are sensitive enough that most users would rather not have a third party profiling their patterns. The privacy posture is also why the app works fully offline: there is no server it needs to talk to.

The web tool at brainwavegenenator.com uses standard web analytics (Google Analytics 4) for aggregate traffic measurement — page views, country, browser type. It does not tie listening behavior to identifiable users. If you want zero analytics, the mobile app is the cleaner option.

• Try the web generator now — 4 presets, live frequency engine, no signup
• Browse all 40 app presets — the full preset library with use cases
• What are binaural beats? — the underlying science and how the effect is produced
• Download the mobile app — iOS and Android, free with optional premium
• Privacy and data policy — the full privacy details for both the web tool and the app