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Privacy Policy

1. Controller

Susann Müller
Engelbert-Schoner-Weg 4
99425 Weimar, Germany
Email: sport_challenges@web.de

2. What data we collect

When you use Sport Challenges, the following data is stored:

• Email address and display name (on registration)
• Profile picture (optional, uploaded by the user)
• Completed challenges and personal goals
• Activity data (points, XP, categories, streak)
• App settings (language, theme)

3. Purpose of processing

Your data is used solely to provide the app's features — in particular to save your progress and display your profile. We do not share your data with third parties for advertising purposes.

4. Legal basis

Processing is based on Art. 6(1)(b) GDPR (performance of a contract) and Art. 6(1)(a) GDPR (consent for optional data such as your profile picture).

5. Retention period

Your data is stored for as long as your account exists. After account deletion, all personal data is removed within 30 days.

6. Firebase and Google

This app uses Firebase by Google (Google Ireland Limited, Gordon House, Barrow Street, Dublin 4, Ireland) for the following services:

• Firebase Authentication — for user login
• Cloud Firestore — to store app data
• Firebase Hosting — to serve the app

Google processes data on servers within the EU. We have a data processing agreement with Google in accordance with Art. 28 GDPR. Further information: firebase.google.com/support/privacy

7. Cookies and local storage

The app uses local storage (localStorage / IndexedDB) exclusively for technically necessary purposes:

• Login state (Firebase Authentication session)
• Theme preference (light/dark)
• Language preference

No tracking cookies are set. No user tracking takes place.

8. Your rights

Under GDPR you have the right to:

• Access your stored data (Art. 15 GDPR)
• Correction of inaccurate data (Art. 16 GDPR)
• Deletion of your data (Art. 17 GDPR)
• Restriction of processing (Art. 18 GDPR)
• Object to processing (Art. 21 GDPR)
• Lodge a complaint with a data protection authority

To exercise your rights, contact us at: sport_challenges@web.de

9. Minors

This app may be used by minors. Registration by minors requires the consent of a parent or legal guardian.

10. Changes

This privacy policy may be updated when necessary. The current version is always available on this page.

Last updated: May 2026