mcclabo ("we", "our", or "us") built the 数独 - Sudoku Puzzle app as a free app supported by advertisements. This page informs users of our policies regarding the collection, use, and disclosure of personal information when using our Service.

By using the Service, you agree to the collection and use of information in accordance with this policy.

Information We Collect

We collect limited information to provide and improve our Service. The categories of information we collect are as follows:

• Region information: You may voluntarily register your region (prefecture, country) to participate in regional rankings. This information is stored on our server solely for the purpose of displaying rankings. We do not use location APIs or GPS data.
• Daily Mission and game scores: In the Daily Mission feature, all users solve the same puzzle each day. Your score and completion time are submitted to our server to display leaderboards. Your local play history is stored on-device.
• Reward data: Points earned through gameplay and rewards obtained (BGM, avatars, wallpapers) are stored on our server to sync your progress across reinstalls.
• Stamp and Friend feature: When you send or receive stamps, your display name and stamp activity may be visible to other users. No direct text messages are exchanged between users.
• Puzzle solution data: When you choose to share your solution or view other users' solutions, the solution steps are stored on our server. This data is associated with your in-app display name only.
• Crash reports and analytics: We may collect anonymized crash reports and usage statistics (e.g., app version, device OS version) to diagnose problems and improve the app. This data cannot identify individual users.

Advertising

This app displays advertisements provided by third-party ad networks, including Google AdMob. These ad networks may use cookies and similar technologies to serve ads based on your prior visits to this or other websites and apps. Advertising revenue allows us to offer the app for free.

You can opt out of personalized advertising by visiting Google's Ads Settings. For more information on how Google uses data from apps that use its services, please visit How Google uses data when you use our partners' sites or apps.

How We Use Your Information

• To display Daily Mission and regional / global rankings
• To manage and sync your reward points and obtained rewards
• To enable the Stamp and Friend features
• To store and share puzzle solution data
• To diagnose bugs and improve app performance
• To serve relevant advertisements

Data Sharing

We do not sell or rent your personal information to third parties. We may share anonymized, aggregated data with third-party service providers (e.g., analytics and advertising partners) solely to operate and improve our Service.

Data Retention

We retain your region and ranking data for as long as you use the Service. You may request deletion of your data at any time by contacting us at the address below.

Children's Privacy

Our Service is not directed to children under the age of 13. We do not knowingly collect personal information from children under 13. If we discover that a child under 13 has provided us with personal information, we will delete it promptly.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page with an updated date. You are advised to review this page periodically.

Contact Us

If you have any questions about this Privacy Policy, please contact us:

mcclabo
Email: support@mcclabo.com