Privacy Policy
Effective: May 4, 2026 · Last updated: May 4, 2026
Guitar Highway (the "App") respects your privacy. This policy explains what data the App processes, what permissions it uses, and how it stores information.
1. Information collected and transmitted
The App does not transmit any personal information to external servers. No accounts, sign-up, login, advertising identifiers, location data, or contacts are used.
2. Data stored on your device
The following data is stored only on your iPhone/iPad and can be deleted by you at any time.
| Item | Purpose | How to delete |
|---|---|---|
| User profile (name, avatar color) | Separate progress for multiple users on one device | More → Progress → User management → Delete |
| Practice session records (date, score, riff title, duration) | Weekly trend, exercise stats, course progress | More → Progress → Reset history |
| Onboarding/course progress (per-day score, completion) | Level promotion, course graduation | Same as above (Reset history) |
| Saved score images | Stores recognized notes from captured sheet music | Removed when you uninstall the app |
3. Permissions used
Microphone / Audio Interface
Used to analyze the pitch and timing of your guitar in real time, via the built-in microphone or a connected audio interface. Audio is never recorded or stored; analysis happens entirely in memory and is discarded immediately.
Camera
Used to capture sheet music photos for automatic note recognition. Photos are stored on your device only when you explicitly save them, and are never sent externally.
Photo Library
Accessed only when you explicitly pick a score image. The App does not enumerate your photo library and does not collect any photo identifiers.
4. Machine learning processing
Note recognition uses an on-device ONNX model. Images are not uploaded to any cloud server — all inference happens locally on your device.
5. Advertising, analytics, and tracking
The App contains no advertising SDKs, analytics tools, tracking pixels, or third-party SDKs. Anonymous statistics that Apple's App Store automatically collects (download counts, crash reports) follow Apple's own policies.
6. Children's privacy
The App does not separately collect personal information from users under 13. All data stays on the device and can be managed at the device level by a guardian.
7. Changes to this policy
Material changes to this policy will be announced through an app update or this page. The date at the top of this page reflects the most recent revision.
8. Contact
For privacy-related inquiries, please reach us at:
Email: hello@guitarhighway.co.kr