隐私政策
Privacy Policy
最后更新日期：2026 年 8 月
核心要点
你的学习进度只保存在你自己的设备上，我们读不到。但应用确实会向外发送一部分数据：广告、崩溃报告和匿名使用统计。此外还有一个可选的「AI 助教」功能，默认关闭；只有你在设置里主动打开，你输入的提问才会离开设备。
1. 只保存在你设备上的数据
以下内容使用 Hive 数据库存储在本地，不会上传：
- 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：正确率、总答题数、各章节统计
- 学习记录：学习天数、连续学习天数
- 错题记录：答错的题目编号，用于错题复习
- 应用设置：主题、语言、字号、AI 助教开关
2. 会离开你设备的数据
为了展示广告、修复崩溃和了解哪些内容需要改进，应用会向下列服务发送数据：
- Google AdMob（广告）：广告标识符、设备标识符和大致位置（由 IP 推断，不是 GPS）。这些数据会共享给 Google 用于展示和衡量广告。购买去广告后不再展示广告。
- Firebase Crashlytics（崩溃报告）：崩溃堆栈、设备型号、系统版本、应用版本。用来定位崩溃。
- Firebase Analytics（使用统计）：匿名的界面交互事件，例如打开了哪一章、答了多少题。用来判断课程内容哪里需要改。
- Google Play 结算：购买去广告时由 Google Play 处理。我们收不到、也看不到你的支付信息。
- AI 助教（可选，默认关闭）：见下一节。
3. AI 助教（可选功能，默认关闭）
这个功能默认是关着的。你需要到「设置 → AI 助教」里主动打开，它才会工作。关掉之后，不会再有任何提问内容离开你的设备。
会发送什么
- 你在对话框里输入的文字
- 当前这道题或这节课的内容（题目、选项、正确答案、讲解，以及你选了哪个答案）
- 你的应用语言设置，用来决定回答用哪种语言
- 一个匿名的安装标识符，用来统计每日提问次数
发送到哪里
数据发送到我们运行在 Google Cloud 上的服务器，再转给 Google Vertex AI（Gemini 模型）生成回答。Google 在这里是我们的服务提供方，代表我们处理这些数据，不会用于训练模型。
我们保留什么
- 对话内容我们不保存。对话只存在于应用运行期间，关掉页面就没有了，我们的服务器不写入你的提问文字。
- 我们会保存一个按天计数的数字，跟那个匿名标识符关联，用来执行每日提问上限。
- 我们会记录一条不含任何标识符、也不含提问文字的匿名信号：哪一节课被提问了、以及学习者是否表示答案有误。这用来找出讲错了的题目。
需要你知道的
- 回答由 AI 生成，可能出错。请不要把它当作权威规则裁定。
- 请不要在对话里输入姓名、联系方式等个人信息——这个功能不需要这些信息，我们也不希望收到。
- 每日提问次数有上限，用完后次日恢复。
4. 关于你的身份
应用没有账号系统。我们不要求、也不存储姓名、邮箱、密码或手机号。上面提到的匿名标识符由设备自动生成，仅用于计数，不指向具体的人。卸载重装后会得到一个全新的标识符，之前的记录无法与你关联。
5. 我们不收集的数据
- 姓名、邮箱、密码、手机号、住址
- 通讯录、日历、短信
- 照片、视频、音频、设备上的文件
- 精确位置（GPS）
- 健康、财务或生物识别信息
6. 删除你的数据
- 本地数据：卸载应用，或在「设置 → 应用管理 → 日麻道场 → 清除数据」中清除，所有学习记录立即永久删除。
- 停止发送：在设置里关闭 AI 助教，就不会再有提问内容离开设备。
- 服务端数据：发邮件到 studio.peach.go@gmail.com 可以要求删除与你的匿名标识符关联的计数记录。
- 广告个性化：可在系统的「设置 → Google → 广告」中重置或删除广告标识符。
注意：删除后无法恢复，请在操作前确认。
7. 儿童隐私
日麻道场面向一般用户，不是专为 13 岁以下儿童设计的，我们也不会在知情的情况下收集儿童的个人信息。如果你认为孩子向我们提供了个人信息，请通过下方邮箱联系我们，我们会予以删除。
8. 第三方服务的隐私政策
注意：应用内可能包含外部链接（参考资料或反馈页面），这些链接会在浏览器中打开，不受本应用控制。
9. 隐私政策更新
我们可能不定期更新本政策。重要变更会通过更新本页顶部的「最后更新日期」体现，建议定期查看。
10. 联系我们
11. 你的权利
根据适用的隐私法规，你享有以下权利：
- 知情权：本页面说明了所有会离开设备的数据。
- 访问权：学习数据和统计可随时在应用内查看。
- 删除权：见第 6 节。
- 选择权：AI 助教默认关闭，随时可以再关掉。
Privacy Policy
隐私政策
Last Updated: August 2026
Key Points
Your learning progress stays on your device and we cannot read it. Some data does leave the app: advertising, crash reports, and anonymous usage statistics. There is also an optional AI tutor, which is off by default — nothing you type reaches us unless you turn it on yourself in Settings.
1. Data that stays on your device
The following is stored locally using the Hive database and is never uploaded:
- Learning progress: unlocked chapters, completed levels, current position
- Quiz statistics: accuracy, total questions answered, per-chapter stats
- Study records: study days and current streak
- Wrong answers: IDs of questions you got wrong, for review
- App settings: theme, language, font size, AI tutor switch
2. Data that leaves your device
To show ads, fix crashes, and learn which lessons need work, the app sends data to these services:
- Google AdMob (advertising): advertising ID, device identifiers, and approximate location (inferred from IP, not GPS). This is shared with Google to serve and measure ads. Buying the ad-free upgrade stops ads being shown.
- Firebase Crashlytics (crash reporting): crash stack traces, device model, OS version, app version — used to find and fix crashes.
- Firebase Analytics (usage statistics): anonymous interaction events, such as which chapter was opened and how many questions were answered — used to decide which lessons need improving.
- Google Play Billing: handled by Google Play when you buy the ad-free upgrade. We never receive or see your payment details.
- AI tutor (optional, off by default): see the next section.
3. The AI tutor (optional, off by default)
This feature is switched off when you install the app. It does nothing until you turn it on under Settings → AI tutor. Turn it back off and nothing you type leaves your device again.
What gets sent
- The text you type into the chat
- The question or lesson you are asking about (its text, options, correct answer, explanation, and which answer you picked)
- Your app language setting, so the reply comes back in your language
- An anonymous installation identifier, used to count your questions per day
Where it goes
To our server on Google Cloud, and from there to Google Vertex AI (Gemini models) to generate the reply. Google acts as our service provider here, processing the data on our behalf. It is not used to train models.
What we keep
- We do not store your conversations. A conversation exists only while the app is open and is gone when you close it. Our server never writes your message text down.
- We keep a per-day counter tied to that anonymous identifier, to enforce the daily question limit.
- We record an anonymous signal — which lesson a conversation was about, and whether the learner said the answer looked wrong — with no identifier and no message text attached. This is how we find questions we got wrong.
What you should know
- Replies are AI-generated and can be wrong. Please don't treat the tutor as an authoritative rules ruling.
- Please don't type personal information into the chat — the feature doesn't need it and we don't want to receive it.
- There is a daily limit on questions, which resets the next day.
4. About your identity
The app has no account system. We never ask for or store a name, email address, password, or phone number. The anonymous identifier described above is generated automatically on the device, is used only for counting, and does not point to a person. Reinstalling the app produces a brand-new identifier that cannot be linked to the old one.
5. Data we do not collect
- Name, email address, password, phone number, postal address
- Contacts, calendar, SMS messages
- Photos, videos, audio, or files on your device
- Precise (GPS) location
- Health, financial, or biometric information
6. Deleting your data
- Local data: uninstall the app, or use Settings → Apps → Riichi Dojo → Clear Data. All learning records are permanently deleted immediately.
- Stop sending: switch the AI tutor off in Settings and nothing further leaves your device.
- Server-side data: email studio.peach.go@gmail.com to request deletion of the counter associated with your anonymous identifier.
- Ad personalisation: reset or delete your advertising ID under Settings → Google → Ads on your device.
Note: Data cannot be recovered after deletion. Please confirm before proceeding.
7. Children's privacy
Riichi Dojo is a general-audience app. It is not directed at children under 13, and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us at the address below and we will delete it.
8. Third-party privacy policies
Note: The app may contain external links (reference material or feedback pages) which open in your browser and are not controlled by this app.
9. Privacy policy updates
We may update this policy from time to time. Significant changes are reflected in the "Last Updated" date at the top of this page. We recommend reviewing it periodically.
10. Contact us
11. Your rights
Under applicable privacy regulations you have the following rights:
- To be informed: this page lists everything that leaves your device.
- Access: your learning data and statistics are viewable in the app at any time.
- Deletion: see section 6.
- Choice: the AI tutor is off by default and can be switched off again at any time.