Privacy Policy for the "Decision Roulette - Wheel Pick" App

Last updated: November 7, 2026

This document sets out the rules for processing personal data by MatCode Mateusz Arczyński (ul. Portowa 10, 86-200 Chełmno, Poland, NIP 875-156-25-99, REGON 383604557, e-mail: matcode.help@gmail.com) - hereinafter the "Administrator". It has been prepared in accordance with Regulation (EU) 2016/679 ("GDPR").

1. In short

• Decision Roulette does not require an account, sign-in, or registration.
• Your custom wheels, option lists, and preferences (language, sound, haptics) are stored strictly on your device. The Administrator has no access to them.
• The App contains no first-party analytics or crash-reporting and does not transmit your personal data to the Administrator's servers.
• The App displays Google AdMob ads (banners and interstitials). This is the only module that may process device identifiers - and only after you provide consent (via the UMP form in EEA/UK and the ATT prompt on iOS).
• The App does not access GPS location, camera, microphone, contacts, photo gallery, or push notifications.

2. Glossary

User - a natural person installing or using the "Decision Roulette - Wheel Pick" mobile application (hereinafter: "App").

Service - the App's functionality, including random wheel spinning, creating and editing custom option lists, quick presets, elimination mode, and sound/haptic feedback.

3. Scope and purposes of data processing

• Wheel and options data (custom lists, option titles, preset selections, language choices, and audio/haptic toggles) is stored locally in the device's storage (SharedPreferences). The Administrator does not receive this data and therefore does not process it under the GDPR.
• Advertising (Google AdMob) - the App serves banner and interstitial ads through Google AdMob. The Google Mobile Ads SDK may process device advertising identifiers (GAID on Android, IDFA on iOS), IP address, diagnostic data, and ad-interaction telemetry to display ads, measure performance, and combat fraud. Legal basis: Art. 6(1)(a) GDPR (consent), collected via the Google User Messaging Platform (UMP) form and the App Tracking Transparency (ATT) prompt on iOS. Where consent is withheld, only non-personalized ads are requested.
• Support Correspondence - if you email us at matcode.help@gmail.com, we process your email address and message contents solely to answer your inquiry; legal basis: Art. 6(1)(f) GDPR (legitimate interest in responding to user inquiries).

4. Data recipients

• Google LLC / Google Ireland Ltd. - for Google AdMob, Google Mobile Ads SDK, and Google UMP.
• Apple Inc. and Google LLC - operating the App Store and Google Play platforms that distribute the App.

5. Data retention

Local data remains on your device until you reset app data or uninstall the App. Support emails are retained only for as long as necessary to resolve your request and protect against legal claims.

6. Your privacy rights

You have the right to withdraw or modify your ad consent at any time:

• on iOS: via system Settings → Privacy & Security → Tracking;
• on Android: via system Settings → Google → Ads;
• via Google Ads settings at adssettings.google.com.

Regarding support emails, you have the right to access, rectify, delete, or restrict processing of your personal data. You also have the right to lodge a complaint with your local data protection supervisory authority.

7. Data security

We implement appropriate technical measures. Online network traffic to Google AdMob is protected by industry-standard TLS encryption. Local lists and options are protected by iOS and Android application sandbox isolation.

8. Children's privacy

The App is not directed at children under 13 and does not knowingly collect any personal data from children.

9. Changes to this Policy

The current version is always available at https://matcode.eu/hub/decisionroulette/policy-en.html. Any modifications will be indicated by the updated date at the top of this document.

For questions or support, contact us at: matcode.help@gmail.com.