隐私政策
Privacy Policy
最后更新日期：2026 年 9 月 23 日
核心要点
国标麻将道场是一款可完全离线使用的学习应用，您的学习进度仅存储在您的设备上。我们不要求您提供姓名、邮箱或注册账号，也不出售或共享个人信息。为了改进应用并修复崩溃，应用会向 Google 的 Firebase 服务发送使用统计和崩溃报告，这些数据不会与您的身份关联（详见第 5 节）。您的学习进度完全属于您自己，随时可以删除。
1. 我们收集哪些数据
国标麻将道场仅在您的设备本地存储以下数据，以提供学习功能：
- 学习进度：已解锁的章节、已完成的关卡、当前关卡位置
- 答题统计：答题正确率、总答题数、各章节统计数据
- 错题记录：答错的题目 ID，用于错题复习功能
- 应用设置：语言、主题（深色/浅色）、字号偏好等
2. 数据存储方式
✓ 本地存储：所有数据使用 Hive 数据库存储在您的设备本地。
✓ 没有我们自己的服务器：我们不运营任何服务器，应用也不会上传其本地数据库。唯一离开您设备的数据，是第 5 节所述、发送给 Google Firebase 服务的使用统计和崩溃报告。
✓ 可离线使用：应用可以在没有网络连接的情况下完全正常使用；使用统计和崩溃报告会在有网络连接时发送。
3. 我们不收集的数据
为了保护您的隐私，国标麻将道场明确不收集以下信息：
- 个人身份信息（姓名、邮箱、电话号码等）
- 硬件标识符，如 IMEI 或序列号（Google Analytics for Firebase 会自行分配一个随机的应用实例 ID，详见第 5 节）
- 精确位置（GPS）。Google Analytics for Firebase 仅根据经过掩码处理的 IP 地址推断大致位置（例如您所在的国家/地区）
- 通讯录、照片、文件或您设备上的其他内容
- 用于广告的数据：应用不显示广告，我们不会将其收集的任何数据（包括第 5 节所述的 Android 广告 ID）用于广告，也不会与广告商共享
4. 数据删除
如何删除您的数据
由于您的学习数据都存储在您的设备本地，您可以通过以下方式删除：
- 完全删除：删除国标麻将道场应用，设备上存储的所有学习数据将被永久删除（iPhone：设置 → 通用 → iPhone 储存空间 → MCR Dojo → 删除 App）
- 清除应用数据：如果您的手机提供此选项，可在设备的应用设置中清除国标麻将道场的存储数据，在不删除应用的情况下删除所有学习记录
注意：删除数据后将无法恢复（除非您手机自带的备份保留了一份副本，该副本位于您自己的 Google 或 iCloud 账号中），请在操作前确认。已发送的使用统计和崩溃报告由 Google Firebase 按其保留设置存储，不会与您的身份关联。
5. 第三方服务
国标麻将道场使用两项 Google Firebase 服务，用于了解应用的使用情况并修复崩溃。两者都不用于广告，也都不会与您的姓名、邮箱或身份关联：
- Google Analytics for Firebase：使用统计，例如开始或完成某个关卡、某道题答对与否、解锁章节、完成练习、分享，以及评分和反馈按钮的使用情况。Google 的 SDK 还会附带它生成的随机应用实例 ID、设备型号、操作系统和应用版本、语言，以及根据经过掩码处理的 IP 地址推断出的大致位置（例如您所在的国家/地区）。在 Android 上，Google 的 SDK 还会读取设备的广告 ID（除非您已在手机设置中删除该 ID 或选择停用），但不会用于广告。在 iPhone 上，应用从不请求跟踪权限，因此无法获取任何广告标识符。
- Firebase Crashlytics：当应用崩溃或出错时，收集错误堆栈、设备型号、操作系统版本以及应用当时的状态，以便我们修复问题。
Google 依据 Firebase 隐私与安全条款处理这些数据。国标麻将道场不使用以下第三方服务：
- 广告服务：应用不显示任何广告。应用通过一个共享代码库包含了 Google 移动广告（AdMob）SDK，但从不初始化它，也从不请求广告
- 云存储或账号同步服务
注意：应用内可能包含外部链接（用于打开参考资料或反馈页面），这些链接会在您的浏览器中打开，不由本应用控制。本隐私政策发布于工作室网站 peach-studio.com。
6. 儿童隐私
国标麻将道场适合所有年龄段的用户使用。我们不会有意收集任何人（包括儿童）的个人信息；唯一离开设备的数据是第 5 节所述的使用统计和崩溃报告，这些数据不会与任何人的身份关联。
7. 隐私政策更新
我们可能会不定期更新本隐私政策。任何重要变更将通过以下方式通知您：
- 更新本页面的「最后更新日期」
- 在应用商店发布说明中标注
建议您定期查看本隐私政策以了解最新信息。
8. 联系我们
9. 您的权利
根据隐私保护法规，您对自己的数据享有以下权利：
- 访问权：您可以随时在应用内查看自己的学习数据和统计信息
- 删除权：您可以通过删除应用，或在手机提供此选项时清除其存储数据，来删除设备上的所有学习数据（详见第 4 节）
- 数据可携权：虽然应用不提供导出功能，但所有数据都以标准格式存储在您的设备上
Privacy Policy
隐私政策
Last Updated: September 23, 2026
Key Points
MCR Dojo is a learning app that works fully offline, and your learning progress is stored only on your device. We do not ask for your name, email or any account, and we do not sell or share personal information. To improve the app and fix crashes, it sends usage statistics and crash reports to Google's Firebase services; these are not linked to your identity (see Section 5). Your learning progress belongs entirely to you and can be deleted at any time.
1. What Data We Store
MCR Dojo stores the following data locally on your device to provide learning functionality:
- Learning Progress: Unlocked chapters, completed levels, current level position
- Quiz Statistics: Answer accuracy, total questions answered, per-chapter statistics
- Wrong Questions: IDs of incorrectly answered questions for review functionality
- App Settings: Language, theme (dark/light), font-size preference, etc.
2. How Data is Stored
✓ Local Storage: All data is stored locally on your device using Hive database.
✓ No Server of Our Own: We run no servers, and the app does not upload its local database. The only data that leaves your device is the usage statistics and crash reports described in Section 5, sent to Google's Firebase services.
✓ Works Offline: The app works completely offline without any network connection; usage statistics and crash reports are sent when a connection is available.
3. Data We Do NOT Collect
To protect your privacy, MCR Dojo explicitly does NOT collect the following:
- Personal identity information (name, email, phone number, etc.)
- Hardware identifiers such as the IMEI or serial number (Google Analytics for Firebase assigns its own random app-instance ID; see Section 5)
- Precise location (GPS). Google Analytics for Firebase derives only a general location, such as your country, from a masked IP address
- Contacts, photos, files, or other content on your device
- Data for advertising: the app shows no ads, and we do not use anything it collects, including the Android advertising ID in Section 5, for advertising or share it with advertisers
4. Data Deletion
How to Delete Your Data
Since your learning data is stored locally on your device, you can delete it by:
- Complete Deletion: Delete the MCR Dojo app, and all learning data stored on the device is permanently deleted (on iPhone: Settings → General → iPhone Storage → MCR Dojo → Delete App)
- Clear App Data: On phones that offer it, clear MCR Dojo's storage in your device's app settings to delete all learning records without removing the app
Note: Data cannot be recovered after deletion, unless your phone's own backup (in your own Google or iCloud account) holds a copy. Please confirm before proceeding. Usage statistics and crash reports already sent are kept by Google Firebase under its retention settings and are not linked to your identity.
5. Third-Party Services
MCR Dojo uses two Google Firebase services, to understand how the app is used and to fix crashes. Neither is used for advertising, and neither is linked to your name, email or identity:
- Google Analytics for Firebase: usage statistics, such as a level started or finished, whether a question was answered correctly, a chapter unlocked, a practice drill completed, a share, and use of the rating and feedback buttons. Google's SDK adds a random app-instance ID it generates, the device model, operating system and app version, language, and a general location (such as your country) derived from a masked IP address. On Android, Google's SDK also reads the device's advertising ID (unless you have deleted it or opted out in your phone's settings); it is not used for advertising. On iPhone the app never asks for permission to track, so no advertising identifier is available to it.
- Firebase Crashlytics: when the app crashes or hits an error, the stack trace, device model, operating system version, and the app's state at that moment, so we can fix the problem.
Google processes this data under the Firebase Privacy and Security terms. MCR Dojo does NOT use the following third-party services:
- Advertising services: the app shows no ads. It includes Google's Mobile Ads (AdMob) SDK through a shared code library, but never initializes it or requests an ad
- Cloud storage or account-sync services
Note: The app may contain external links (for reference materials or feedback pages), which open in your browser and are not controlled by this app. This privacy policy is published on peach-studio.com, the studio's website.
6. Children's Privacy
MCR Dojo is suitable for users of all ages. We do not knowingly collect personal information from anyone, including children; the only data that leaves the device is the usage statistics and crash reports described in Section 5, which are not linked to anyone's identity.
7. Privacy Policy Updates
We may update this privacy policy from time to time. Any important changes will be communicated to you through:
- Updating the "Last Updated" date on this page
- Noting the change in the app store release notes
We recommend reviewing this privacy policy periodically to stay informed.
8. Contact Us
9. Your Rights
According to privacy protection regulations, you have the following rights regarding your data:
- Access Right: You can view your learning data and statistics within the app at any time
- Deletion Right: You can delete all learning data on your device by deleting the app or, where your phone offers it, clearing its storage (see Section 4)
- Data Portability: Although the app does not provide an export feature, all data is stored in standard format on your device