LinePrep

1. Data Protection at a Glance

The following notices provide a simple overview of what happens to your personal data when you visit this website. Personal data is any data by which you can be personally identified.

For detailed information on data protection, please refer to our privacy policy listed below this text.

2. Data Controller

Name: Samuel Reitenbach

Address: Eichenstr. 8

49090 Osnabrück

Email: samuel.reitenbach@gmail.com

Phone: +49 15788197955

The controller is the natural or legal person who alone or jointly with others determines the purposes and means of the processing of personal data.

3. Data Collection on This Website

What personal data do we collect?

We collect the following personal data when you register and use our service:

Email address (for account creation and authentication)
Display name (optional)
Practice data and progress statistics (to provide the spaced repetition functionality)

What technical data do we collect?

When you visit our website, our web server automatically collects:

IP address
Browser type and version
Time of access

4. Legal Basis for Data Processing

We process your personal data based on the following legal grounds:

Art. 6(1)(a) GDPR (Consent): When you create an account, you consent to the processing of your data
Art. 6(1)(b) GDPR (Contract): Processing is necessary to provide our chess practice service
Art. 6(1)(f) GDPR (Legitimate Interests): We have a legitimate interest in improving our service and preventing abuse

5. Third-Party Services

Supabase (Database & Authentication)

We use Supabase for user authentication and data storage. Your data is stored on servers in the EU. Supabase is GDPR compliant.

Google OAuth (Optional Authentication)

If you choose to sign in with Google, we receive your email address and basic profile information from Google. This is processed according to Google's privacy policy.

6. Cookies and Session Data

Our website uses cookies to maintain your login session. These are essential cookies required for the website to function properly.

You can configure your browser to inform you about the use of cookies so that you can decide on a case-by-case basis whether to accept or reject a cookie. Alternatively, your browser can be configured to automatically accept cookies under certain conditions or to always reject them.

7. Your Rights

You have the following rights regarding your personal data:

Right of access: You have the right to obtain confirmation as to whether personal data concerning you is being processed and to access this data
Right to rectification: You have the right to have inaccurate personal data corrected
Right to erasure: You have the right to have your personal data deleted
Right to restriction of processing: You have the right to request restriction of processing of your personal data
Right to data portability: You have the right to receive your personal data in a structured, commonly used format
Right to object: You have the right to object to processing of your personal data
Right to withdraw consent: If processing is based on your consent, you have the right to withdraw consent at any time

You also have the right to lodge a complaint with a supervisory authority if you believe that processing of your personal data violates the GDPR.

8. Data Retention

We retain your personal data only for as long as necessary to provide our services and comply with legal obligations. When you delete your account, all associated personal data will be permanently deleted within 30 days.

9. Data Security

We use appropriate technical and organizational measures to protect your personal data against unauthorized access, loss, or alteration. All data transmissions are encrypted using SSL/TLS technology.

10. Changes to This Privacy Policy

We reserve the right to update this privacy policy to reflect changes in our practices or for legal, operational, or regulatory reasons. We will notify you of any material changes by posting the new privacy policy on this page.

Last updated: 12/11/2025