Privacy Policy
Effective: May 4, 2026 · Last updated: July 28, 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 personally identifiable information to external servers. No accounts, sign-up, login, advertising identifiers, location data, or contacts are used.
Only anonymous usage statistics are collected to improve the App (see section 5). Song titles, score photos, recordings, and your playing are never transmitted and stay on your device. You can turn statistics off at any time in the App settings.
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 and analytics
The App contains no advertising SDKs and no tracking pixels. We do not track you across apps or websites, do not sell data to third parties, and perform no activity subject to App Tracking Transparency (ATT).
To improve the App we collect anonymous usage statistics through Google Firebase Analytics, limited to the following:
| Item | Details | Purpose |
|---|---|---|
| Feature usage counts | How often score recognition, practice sessions, and tuner completions occur | Understand which features are actually used |
| Practice result values | Score, BPM, practice duration, number of recognized measures and notes | Tune difficulty and improve recognition quality |
| Screen navigation | Which screen you leave the app from | Improve the usage flow |
| Device environment | Device model, OS version, app version, country (collected by Firebase by default) | Identify compatibility problems |
Never collected: song titles, score photos, recordings, performance audio, names, contacts, or location. That data never leaves your device.
How to turn it off: App → More → Recording & Sharing settings → turn off "Send anonymous usage stats" and nothing further is transmitted. Download counts and crash reports collected by the stores (App Store, Google Play) follow each store's own policies.
6. Children's privacy
The App does not separately collect personal information from users under 13. Practice data, scores, and recordings all stay on the device and can be managed at the device level by a guardian, and anonymous usage statistics can be turned off in the App settings.
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