数独教练（Sudoku Coach）隐私政策

生效日期:2026 年 7 月 14 日 · 应用包名:com.sudokucoach.sudoku_coach

本隐私政策说明「数独教练」(以下称"本应用")如何处理你的信息。本应用由个人开发者开发。使用本应用即表示你同意本政策所述的做法。

1. 我们收集与不收集的信息

• 账号信息:无。本应用无需注册或登录,不收集你的姓名、手机号或邮箱(除非你主动发邮件联系我们)。
• 仅存于本机的数据:你的游戏进度、统计、设置、以及你自建/导入的题目仅保存在你的设备本地,不会上传到我们的服务器。卸载应用即删除。
• 相机与相册(拍照导入):仅在你主动使用"拍照导入题目"时才访问。图片中的数字识别在你的设备本地完成(Google ML Kit 端上文字识别),图片不会被上传或保存。
• 通知:本应用可发送本地提醒(如"回来练一局"),该功能不收集数据。

2. 第三方服务收集的信息

本应用集成了以下 Google 服务,它们可能会收集设备与使用信息:

• Google AdMob(广告):用于展示广告。可能收集设备广告标识符(Advertising ID)、IP 地址、设备信息、粗略位置以及广告互动数据,用于投放和衡量广告(个性化或非个性化)。
• Google Firebase Analytics(分析):用于了解应用使用情况以改进体验。以匿名/化名方式收集应用实例 ID、设备与操作系统信息、粗略位置(基于 IP)及使用事件。

这些数据由 Google 按其隐私政策处理,并可能在 Google 位于其他国家/地区的服务器上处理。相关说明:

• Google 隐私政策:https://policies.google.com/privacy
• Google 如何使用合作伙伴应用的数据:https://policies.google.com/technologies/partner-sites
• Firebase 隐私与数据:https://firebase.google.com/support/privacy

3. 信息如何被使用

• 提供并改进应用功能与体验;
• 展示与衡量广告(以维持本应用免费);
• 了解匿名的整体使用趋势(如活跃、留存)。

我们不会出售你的个人信息。

4. 儿童隐私

本应用面向 13 岁及以上的一般受众,并非专门面向儿童。若你未满 13 岁(或你所在地区规定的相应年龄),请在监护人同意下使用。我们不会有意收集儿童的个人信息;若你认为儿童向我们提供了信息,请联系我们删除。

5. 你的选择与控制

• 广告个性化:可在设备"设置 → Google → 广告"中重置或删除广告标识符、选择停用广告个性化。
• 本机数据:卸载应用即可删除设备上的全部应用数据。
• 如需就你的数据行使权利(访问/删除等),可发邮件联系我们。

6. 数据保留

本机数据在你卸载应用前保留在你的设备上。第三方(Google)收集的数据按其各自政策保留。

7. 政策变更

我们可能会不时更新本政策。重大变更会更新本页顶部的生效日期。请定期查看。

8. 联系我们

如对本隐私政策有任何疑问,请联系:petrolinkliu@gmail.com

Sudoku Coach — Privacy Policy

Effective date: July 14, 2026 · Package: com.sudokucoach.sudoku_coach

This Privacy Policy explains how Sudoku Coach ("the app"), developed by an individual developer, handles your information. By using the app, you agree to the practices described here.

1. Information we do and don't collect

• No account. The app requires no sign-up or login. It does not collect your name, phone number, or email (unless you email us directly).
• On-device data: your game progress, statistics, settings, and any puzzles you import are stored only on your device and are not uploaded to our servers. They are deleted when you uninstall the app.
• Camera & photos (puzzle import): accessed only when you actively use "import a puzzle by photo." Digit recognition runs entirely on your device (Google ML Kit on-device text recognition); images are never uploaded or stored.
• Notifications: the app may send local reminders (e.g., "come back for a puzzle"). This feature collects no data.

2. Information collected by third-party services

The app integrates the following Google services, which may collect device and usage information:

• Google AdMob (ads): to display ads. May collect your device Advertising ID, IP address, device information, coarse location, and ad-interaction data to serve and measure ads (personalized or non-personalized).
• Google Firebase Analytics: to understand app usage and improve the experience. Collects, in a pseudonymous form, an app instance ID, device and OS information, coarse location (from IP), and usage events.

This data is handled by Google under its own policies and may be processed on Google servers in other countries. See:

• Google Privacy Policy: https://policies.google.com/privacy
• How Google uses data from partner apps: https://policies.google.com/technologies/partner-sites
• Firebase privacy & data: https://firebase.google.com/support/privacy

3. How information is used

• To provide and improve the app's features and experience;
• To display and measure ads (which keep the app free);
• To understand anonymous, aggregate usage trends (e.g., active users, retention).

We do not sell your personal information.

4. Children's privacy

The app is intended for a general audience aged 13 and older and is not directed to children. If you are under 13 (or the equivalent age in your region), please use it only with a guardian's consent. We do not knowingly collect personal information from children; if you believe a child has provided us information, contact us to have it deleted.

5. Your choices and controls

• Ad personalization: you can reset or delete your Advertising ID and opt out of ad personalization in your device settings (Settings → Google → Ads).
• On-device data: uninstalling the app deletes all app data from your device.
• To exercise rights over your data (access/deletion, etc.), email us.

6. Data retention

On-device data remains on your device until you uninstall the app. Data collected by third parties (Google) is retained under their respective policies.

7. Changes to this policy

We may update this policy from time to time. Material changes will be reflected by updating the effective date at the top of this page. Please review it periodically.

8. Contact us

For any questions about this Privacy Policy, contact: petrolinkliu@gmail.com