Privacy Policy for Mainichi

Last updated: [09 December 2025]

Introduction Mainichi (“we,” “us,” or “our”) respects your privacy. This Privacy Policy explains how we collect, use, and safeguard your information when you use our mobile application, Mainichi (Habit Tracker).

1. Information We Collect

A. Guest Mode Users If you use the app in Guest Mode (without logging in), we do not collect any personal data. All your habit data is stored locally on your device’s internal storage and is not transmitted to any server.

B. Registered Users (Online Mode) If you choose to sign up or log in for synchronization features, we collect:

Email Address: Used for account authentication and unique identification.

Habit Data: Titles, descriptions, frequencies, and completion status of your habits are uploaded to our secure cloud server (Supabase) to enable synchronization across devices.

C. Device & Security Information To ensure security and prevent app piracy, we may check:

Device Integrity Status (via Google Play Integrity API, if available).

App Licensing Status (via Google Play Licensing Library).

Device ID (used momentarily for license verification and not permanently stored on our servers).

2. Third-Party Services The app does use third-party services that may collect information used to identify you:

Supabase: As our backend database and authentication provider. (Supabase Privacy Policy)

Google Play Services: For license verification and integrity checks on GMS-supported devices. (Google Privacy Policy)

3. Data Security We value your trust in providing us with your Personal Information. We use industry-standard encryption (SSL/TLS) when transmitting your data to Supabase servers. However, remember that no method of transmission over the internet, or method of electronic storage is 100% secure and reliable.

4. Data Deletion You have the right to delete your data.

Local Data: You can delete local data by uninstalling the application or clearing the app storage in Android settings.

Account Data: If you are a registered user, you can request the deletion of your account and all habit data stored on the server by contacting us at Rareta Developer.

5. Children’s Privacy These Services do not address anyone under the age of 13. We do not knowingly collect personally identifiable information from children under 13.

6. Changes to This Privacy Policy We may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes.

Email: Rareta Developer