Privacy Policy — Volume Balance

1. What the App Does

Volume Balance is a browser extension (Chrome, Firefox) and Safari extension (macOS, iOS) that processes audio of the page you are currently listening to using the browser's built-in Web Audio API. It applies dynamic range compression and an optional master volume so that loud and quiet passages of videos, music, podcasts, and social-media clips become more even.

2. Data Controller

For the full legal entity details, see the Impressum.

3. Audio Processing

Volume Balance attaches to <audio> and <video> elements on the page you are using and routes their audio through a compressor and gain stage in the Web Audio API. The processed audio is sent straight to your speakers or headphones.

• No audio is recorded.
• No audio is sent to Adelvo or any third party.
• DRM-protected streams (e.g. Netflix, Disney+, Apple TV) cannot be processed by browser extensions and are simply passed through unchanged.

4. Browser Permissions

The extension requests the following browser permissions, each used only for the purpose listed:

There is no microphone access, no camera access, no clipboard access, and no access to your browsing history.

5. Local Storage

The extension stores the following data locally, using the browser's built-in extension storage (storage.sync / storage.local):

• Compressor settings and any custom presets you create
• The preset assigned to a given site (host name only, never the full URL or query string)
• Master volume level per site
• Whether the extension is enabled or disabled
• Trial start timestamp (used to compute the cyclic trial state)
• License key, if you have purchased a license
• Timestamp of the last successful license verification
• A random anonymous identifier (UUID) generated on first launch, used as a "machine fingerprint" so a purchased license can be activated for this browser

If you are signed into your browser with a sync account (Google account in Chrome, Mozilla account in Firefox, iCloud in Safari), your browser may synchronise these values between your own devices. This synchronisation is performed by your browser vendor — Adelvo does not see this data.

6. License Validation

6.1 Chrome and Firefox

Volume Balance for Chrome and Firefox uses Keygen (api.keygen.sh) to validate paid licenses. Network requests to Keygen are made only:

• when you enter a license key for the first time,
• periodically to re-verify an active license, and
• when you click "Deactivate license" to release the license slot.

The following data is sent in these requests:

• The license key
• The anonymous UUID generated by the extension
• A short string describing your browser (the first 80 characters of navigator.userAgent), used as a label so you can recognise this device in your license overview

If your device is offline, the extension continues to work with the last successful verification for up to 30 days. There is no telemetry channel and no other server contact.

6.2 Safari (macOS / iOS)

Volume Balance for Safari does not use Keygen. License entitlement comes directly from the Apple App Store receipt and is checked on-device. No data is sent to Adelvo or to Keygen for the Safari version.

7. Purchases

Adelvo never sees your full payment details (card number, billing address, etc.) — only the anonymous entitlement information needed to mark the license as active.

8. License Keys

License keys are stored only on the device, in the browser's extension storage. They are never transmitted to anyone other than Keygen, and only for the purposes of license validation described in section 6.

9. Analytics and Tracking

Volume Balance contains no analytics SDKs, no tracking, no advertising identifiers, no crash reporting. No telemetry is sent to Adelvo or any third party from the extension itself.

10. Your Rights (GDPR / CCPA)

Because Volume Balance does not send any personal data to Adelvo, there is typically no data on our side to access, rectify, or delete. If you nevertheless have a request, contact us at hello@adelvo.io. Your full GDPR and CCPA rights are described in the general Privacy Policy.

For data held by Paddle (in connection with your purchase) or by Keygen (in connection with your license record), please exercise your rights directly with the respective provider, or contact us and we will forward the request.

You can erase all locally stored extension data at any time by:

• clicking "Deactivate license" in the popup, which unregisters this device with Keygen and wipes locally stored license information, or
• removing the extension from your browser, which deletes its storage along with it.

11. Children's Privacy

Volume Balance is a general-purpose audio utility and is not directed at children under 13. We do not knowingly collect data from them.

12. Changes to This Policy

We may update this policy as the extension evolves. Changes will be posted on this page with an updated effective date.

13. Contact

For any privacy-related questions or requests regarding Volume Balance: