Privacy Policy — Jazz Guitar App

This privacy policy describes how the Jazz Guitar app (“the App”) handles your data.

            In short: The developer collects nothing about you. Your practice history is stored on your device and synced through your own private iCloud account — only you can see it. The microphone is used only for real-time pitch detection, and audio is processed on your device and immediately discarded. No analytics, no tracking, no ads.
        

Microphone usage

The App uses your device’s microphone solely for real-time pitch detection in the trainers and tuner, to check the notes you play. Audio is analyzed on your device in real time and immediately discarded — it is never recorded, saved, or transmitted. (The ear trainer plays sounds for you to identify and does not use the microphone at all.)

Your practice data and iCloud

The App stores your practice history and statistics on your device so it can show your progress and decide what to review next. If you are signed into iCloud, this data is synced across your own devices through Apple’s iCloud (a private database tied to your Apple ID); otherwise it stays only on your device. Either way the data lives in your own iCloud account — the developer operates no servers and has no access to it. iCloud syncing is provided by Apple under Apple’s Privacy Policy. You can export a copy as a JSON file, or erase everything, from Settings › Data.

Subscriptions and purchases

Premium is an auto-renewing subscription sold through the Apple App Store. Purchases are processed by Apple; the developer never receives your name, payment details, or Apple ID. Whether you have an active subscription is checked on your device through the App Store. Apple’s handling of this information is described in Apple’s Privacy Policy.

Settings

Your preferences (such as note naming, reference pitch, and appearance) are stored locally on your device and are not synced or transmitted. They are removed when you delete the App.

No analytics or tracking

The App does not use any analytics services, advertising frameworks, or third-party tracking technologies, and it does not track you across other apps or websites.

No third-party sharing

The developer does not collect personal data and does not sell or share any data with third parties. The only data that leaves your device goes to Apple’s own services — iCloud sync and App Store purchases — on your behalf, under Apple’s policies.

Data retention and deletion

Your practice history is kept until you remove it. You can reset all statistics from Settings › Data (this also clears the data on every device synced via iCloud), and deleting the App removes its local data. To remove the iCloud copy as well, delete the App’s iCloud data from Settings › [your name] › iCloud.

Children’s privacy

The developer does not collect personal information from anyone, including children under the age of 13.

Controller and your rights

The controller responsible for this policy is Dr. Oliver M. Duschka; the postal address is published in the Impressum. Because the App collects no personal data, there is normally nothing the developer could access, correct, or erase — your practice data stays under your own control, on your device and in your iCloud account. If you nevertheless believe personal data concerning you is being processed, you have the rights under the GDPR to access, rectification, erasure, restriction of processing, and data portability, and you may lodge a complaint with a data protection supervisory authority.

Changes to this policy

If this privacy policy is updated, the revised version will be posted at this URL with an updated effective date.

Contact

If you have questions about this privacy policy, please contact support@duschka.com.

Effective date: June 7, 2026