Privacy Policy

Last updated: August 21, 2026

1. Introduction

Dian Dian is published by OVERRIDE, SASU with a capital of 1 euro, registered under SIREN 953 122 868. This Privacy Policy explains how we collect, use, and protect your personal information.

2. Data We Collect

• Account information: email address and password (stored securely hashed).
• Tracker data: the pages, day cells, colors, and legend entries you create.
• Technical data: basic server logs (IP address, timestamps) for security.

3. How We Use Your Data

• To provide and maintain the service.
• To authenticate you and keep your account secure.
• To sync your tracker data across devices.

We do not sell your data or use it for profiling.

4. Third-Party Services

• Google AdMob: the free version of the app displays banner ads via Google AdMob. AdMob may collect device identifiers and usage data according to Google's Privacy Policy. Premium users are not shown ads.
• In-App Purchases (Apple & Google): subscriptions and purchases are processed by Apple (App Store) or Google (Google Play), depending on your device. We do not have access to your payment information. See Apple's Privacy Policy and Google's Privacy Policy.

We do not use any other third-party analytics or tracking scripts. No personal data is shared with or sold to third parties.

5. Cookies

We use cookies solely for authentication (session tokens). No tracking or advertising cookies are used on the website.

6. Data Storage & Security

Your data is stored on servers hosted by Vultr. Passwords are hashed using Argon2. All connections are encrypted via HTTPS.

7. Data Retention & Deletion

We retain your data while your account is active. You can delete your account and all data at any time from the app.

8. Your Rights (GDPR)

If you are in the EEA, you have the right to access, correct, delete, export, or restrict processing of your data. Contact us at contact@diandian.overridedev.com.

9. Changes

We may update this policy. Material changes will be communicated via email.

10. Contact

Questions? contact@diandian.overridedev.com