Last updated: June 10, 2026
Welcome to Shikaku Matrix (https://shikakuu.xyz/). We value your privacy and are committed to protecting your personal data.
We do not collect any personal identifier details automatically on the landing page. However, our Android mobile application integrates Firebase Authentication (Google Sign-In) to sync campaign levels, streaks, and user profile progress, and Firebase Firestore to manage user settings and friend lists. If you connect using Google, we store your email address and display name securely on Firebase servers.
We use Start.io SDK in the mobile app to display advertisements which help keep the game free to play. Start.io may collect anonymous device parameters for ad personalization purposes. We do not sell or trade your data.
You can disconnect your Google account and completely wipe your profile from the Cloud directly from the mobile app's settings menu at any time.
If you have any questions about this Privacy Policy, please contact the developer via GitHub.