Privacy Notice

Effective Date: 2026-05-01 · Last Updated: 2026-07-02 · Version: 1.2

This Privacy Notice explains how the Mind the Guitar mobile application (the “App”) handles personal data when you use it. It is issued together with our Terms of Use.

The data controller for the App is Michał Gajek, an individual sole developer (acting as a private individual) operating the Mind the Guitar application, with a correspondence address at Aleja Wilanowska 103/49, 02-795 Warszawa, Poland and reachable at contact@mindtheguitar.com (“Developer,” “we,” “us,” or “our”).

1. Local Data Only

Mind the Guitar is designed to operate offline and to keep your data on your device.

We do not maintain user accounts on our servers and we do not receive your personal data. Your profile, progress, settings, and related app data are stored locally on your device only.

2. What the App Stores Locally

The App may store the following information locally on your device:

your optional display name;
your avatar image, if you choose to add one;
your learning progress;
your exercise statistics and streaks;
your app preferences and settings;
local app status flags and backup copies of your profile data.

3. Microphone Access

The App may request access to your microphone only for the tuner feature.

Microphone input is processed locally on your device. We do not record, store, or send your audio to our servers.

4. Photo Library Access

The App may request access to your photo library only if you choose to add or change your avatar.

Any image you choose for your avatar is stored locally on your device. The App does not access the camera, contacts, location, calendar, health data, or any other sensors.

5. Children's Privacy

The App is not directed at children under 13. We do not knowingly collect personal data from children. If you believe a child has provided us with personal data, please contact us so we can take appropriate action.

6. Contacting Us

If you contact us by email at contact@mindtheguitar.com, we will receive the information you choose to include in your message and use it only to respond to you and to keep a record of the correspondence as required by applicable law.

7. Legal Bases (GDPR Art. 6)

We process the limited categories of data described above on the following legal bases:

Performance of a contract (Art. 6(1)(b) GDPR) — to provide the educational features you request when you use the App.
Consent (Art. 6(1)(a) GDPR) — granted by you through the operating system permission prompts when you enable microphone or photo library access.

8. Advertising Measurement and Attribution

If you install the App after clicking one of our advertisements (for example on Facebook, Instagram, or other advertising networks), the App uses a mobile measurement partner, AppsFlyer, to understand whether an ad led to your installation and to measure conversions such as purchases. This is called “attribution.”

For this purpose the App may process:

device and advertising identifiers (such as IDFA on iOS or the Advertising ID on Android, where available and permitted);
limited technical and event data (for example install, app open, start of a trial, and purchase events, including purchase amount and currency).

This processing only takes place with your consent. On iOS you are asked through the system App Tracking Transparency prompt; on all platforms attribution stays disabled until consent is given. If you do not consent, the App still works fully and no advertising identifiers are used for cross-app tracking.

This data may be shared with AppsFlyer and, through AppsFlyer, with the advertising network that served the ad (currently Meta Platforms; other networks such as Google or TikTok may be added in the future). We use it solely to measure advertising performance, not to profile you or make automated decisions within the meaning of Art. 22 GDPR.

If you have not clicked one of our ads, or you decline consent, the App does not perform advertising tracking.

9. Third-Party Services

Except for the advertising measurement described in Section 8 (AppsFlyer, and the relevant advertising network), and the optional subscription and error-handling services described elsewhere in this Notice, the App does not transmit your personal data to third-party services. The App does not include general third-party analytics beyond what is needed for the purposes described here.

10. Data Retention

Data stored on your device is retained for as long as the App is installed or until you delete it (see Section 12).

11. Your Rights (GDPR Art. 15–22)

Because your data stays on your device and we have no access to it, you can exercise most of your rights directly through the App:

Access and portability — your data is visible in the App (Profile, Stats) at any time.
Rectification — you can edit your display name and avatar in Profile.
Erasure (“right to be forgotten”) — see Section 12.
Restriction and objection — you can disable microphone or photo permissions in your device settings, or stop using the App.
Withdrawal of consent — you can revoke microphone or photo library permissions at any time in your device's system settings, without affecting the lawfulness of processing carried out before withdrawal.

12. How to Delete Your Data

You can delete your data at any time using one of the following methods:

In the App, open Profile → Reset Profile → Reset Statistics to clear your exercise statistics and streaks.
In the App, open Profile → Reset Profile → Reset Entire Profile to clear your entire profile (display name, avatar, progress, statistics, and preferences) and return the App to its initial state.
Uninstall the App to remove all locally stored data, including any items kept in the platform-provided secure storage.

We have no copy of your profile data on our servers, so no separate request to us is required to have it deleted. See also our step-by-step deletion guide.

13. Right to Lodge a Complaint

If you believe we are processing your personal data in violation of applicable law, you have the right to lodge a complaint with the Polish supervisory authority:

Prezes Urzędu Ochrony Danych Osobowych (UODO)
ul. Stawki 2, 00-193 Warsaw, Poland
https://uodo.gov.pl

You also have the right to lodge a complaint with the supervisory authority of your country of residence.

14. Security

Sensitive items such as integrity tokens are stored in the platform-provided secure storage (iOS Keychain / Android Keystore via flutter_secure_storage). We rely on the security mechanisms provided by your device's operating system (sandboxed app storage, OS-level encryption at rest). The App disables cleartext HTTP traffic on Android via a network security configuration. No security measure is perfect; you are responsible for keeping your device and operating system up to date.

15. Subscriptions

The App may offer paid features or subscriptions through Apple App Store or Google Play.

Where you make a purchase through one of these platforms, payment processing, billing, renewals, cancellations, and related payment data handling are managed by the relevant platform provider under its own terms and privacy policy.

The App may receive limited information from the platform, such as the status of a purchase or subscription, solely to enable paid features. We do not store your full payment card details.

16. Changes to This Privacy Notice

We may update this Privacy Notice from time to time. If we make material changes, we will update the “Last Updated” date and the version number above and, where appropriate, provide notice in the App.

17. Contact

Michał Gajek — sole developer of the Mind the Guitar application
Aleja Wilanowska 103/49, 02-795 Warszawa, Poland
contact@mindtheguitar.com