Sound & the Body.
Support and privacy policy for Sound & the Body — an interactive 3D atlas of human anatomy that separates measured frequencies from traditional ones, and lets you hear both.
Last updated: October 11, 2026
Sound & the Body has moved to the web
The atlas is no longer distributed through the App Store. It now runs in any modern browser — on your phone, tablet or computer — at:
Everything is there: all nine maps, the 3D models, the live tone engine, and the cited sources for every measured figure. It is free for seven days, then a one-time $1.99 unlock — still no subscription and still no account.
If you already installed the iPhone app, keep it. It goes on working exactly as it does today; it simply will not receive further updates. Nothing is taken away from you, and you are not asked to pay again for what you already bought.
If you bought the unlock on iPhone and would like it on the web as well, email the address at the bottom of this page with your App Store receipt and I will send you a web unlock code at no charge.
Help & troubleshooting
What you need
An iPhone or iPad running iOS 13 or later. The 3D views use WebGL; on a device or setting where 3D is unavailable the app falls back automatically to the flat 2D maps, and everything still works.
How it works
There are nine maps — Brain, Body, Organs, Muscles, Nerves, Cell, Atom, Harmony and Brainwaves. Pick one, then tap any glowing point to see what that structure is, the frequency associated with it, and what that frequency actually means. Press Play tone to hear it.
In 3D, drag to rotate the model. Points are anchored in space on the structures themselves, so some are behind the body and come into view as you turn it. The label appears on the point you select, which keeps the model readable.
Measured science vs. tradition
Every point carries two frequencies, and the Frequency system switch at the top changes which one you are seeing and hearing across the whole atlas.
- EEG brainwaves & audible tones (measured science) — values that have actually been measured: EEG bands, MRI and NMR resonances, motor-unit firing rates, the caesium atomic clock.
- Solfeggio & chakra tones (traditional / unproven) — the familiar "healing frequency" numbers. These are included because people look for them, and they are labelled as belief, not medicine.
Many real physical frequencies are far above hearing (MHz to THz). Where that is the case the app plays a clearly-labelled audible stand-in and says so on screen. Frequencies below about 40 Hz are inaudible as a pitch, so they are played as an isochronic pulse — an audible carrier switched on and off at the target rate — which lets you hear the rhythm.
No sound?
- Check the silent/ring switch and the volume — the app uses the media volume.
- Very low frequencies are pulses, not pitches. If you hear a rhythmic ticking rather than a note, that is correct.
- The oscilloscope under the Play button draws the sound as it plays. If the line is moving, audio is being generated and the issue is output volume or routing.
Your screen staying awake
While a tone is playing the app keeps the display awake, so a session is not cut short by auto-lock. It releases as soon as you stop the sound.
Trial, unlocking and restoring
The app is free to explore for seven days. After that, a single one-time purchase unlocks everything permanently — there is no subscription. You can open the unlock screen at any time by tapping the trial chip at the top of the screen.
If you have bought it before — on this device or another one signed in to the same Apple Account — use Restore a previous purchase on the unlock screen. Restoring requires a network connection, because it checks with Apple.
This is not medical advice
Sound & the Body is an educational and creative tool. It does not diagnose, treat, cure or prevent any condition and is not a substitute for professional medical advice. Tones can be loud — start at a low volume, especially with headphones. If you have a seizure disorder, be aware that rhythmic pulsing sound can be a trigger; stop if you feel unwell.
We have no server, and we never see your data
There are no accounts, no sign-in, no analytics, no advertising and no trackers. We do not collect, sell or share personal information, and we receive nothing about how you use the atlas.
The atlas runs on your device
Every diagram, 3D model and tone is generated on your iPhone or iPad, with WebGL and the Web Audio API. Exploring the atlas needs no network connection, and nothing about what you view or listen to is transmitted anywhere.
What is saved on your device
Stored locally, and never sent to us: that you acknowledged the in-app disclaimer, the date your free trial began, whether you have unlocked the app, and your settings — such as the 2D/3D preference and volume. Deleting the app removes all of it.
When the app does use the network
There are exactly two cases, and neither involves what you do inside the atlas.
- Purchases. Unlocking the app is an in-app purchase, which cannot work offline. When the app starts, and when you buy or restore, it contacts Apple and RevenueCat, the service that verifies purchases on our behalf. They receive an anonymous purchase identifier and receipt details from Apple, along with basic device and app-version information. They do not receive your name, and they receive nothing about your use of the atlas. RevenueCat's privacy policy is at revenuecat.com/privacy.
- Update check. The app asks Apple's public App Store lookup whether a newer version has been published, so it can show an "update available" notice. This request carries no information about you.
RevenueCat is the only third-party SDK in the app, and it is there solely to process and verify purchases. There is no advertising or measurement tooling of any kind.
Children
The app is suitable for general audiences. We collect no personal information from anyone, including children. The purchase information described above is handled by Apple and RevenueCat and is never used for advertising or profiling.
Changes
If this policy changes, the updated version will be posted on this page with a new date above.
Contact
Bug reports, questions, accessibility feedback, or anything about this policy: [email address loading…]
Sound & the Body is made by Rory Corn.