记课时 隐私政策
生效日期：2026 年 8 月 24 日
记课时（课时记录应用，以下简称"本应用"）由个人开发者（以下简称"我们"）开发并维护。本隐私政策旨在向您说明本应用如何收集、使用、存储和保护您的信息。
我们深知隐私的重要性。本应用的核心设计原则是：您的数据仅保存在您自己的设备上，我们不会收集、不会上传、不会共享您的任何个人数据。
一、我们收集哪些信息
本应用不收集任何个人数据。
- 本应用不要求注册、不要求登录、不要求提供手机号、邮箱等任何账号信息。
- 本应用不包含任何广告 SDK、统计分析 SDK、崩溃上报 SDK 或第三方追踪 SDK。
- 本应用不具备任何网络访问功能，不会向任何服务器发送数据。
您在应用内录入的全部信息（学生姓名、课程信息、课时记录、缴费记录、备注等）仅存储在本机设备的本地数据库中（Room 数据库和本地配置文件），始终处于您的设备掌控之下。
二、我们如何使用您的信息
由于我们不收集任何信息，因此不存在对信息的任何使用、处理或分析。
三、信息的共享与披露
我们不会与任何第三方共享、出售、出租或披露您的任何信息。
四、本地存储与安全
- 您的数据仅存储在设备本地的应用数据库与配置文件中，应用卸载后数据将一并删除。
- 本应用提供可选的"安全锁"功能（PIN 码或设备指纹），用于防止他人未经授权查看应用内容。PIN 码仅以加盐哈希形式存储在本机；指纹验证由 Android 系统生物识别框架处理，应用本身不会获取、存储或上传您的指纹信息。
- 由于所有数据均在本机，您的数据安全取决于设备自身的系统安全机制（如锁屏、磁盘加密）。建议您为设备启用系统锁屏和磁盘加密。
五、数据导出、导入与删除
- 导出：您可随时通过"设置 → 导出数据 / 导出 Excel"将全部数据导出为 JSON 或 Excel 文件，保存到您指定的位置。
- 导入：您可通过"设置 → 导入数据 / 导入 Excel"从备份文件恢复数据。导入使用系统文件选择器，仅读取您明确选择的文件。
- 删除：您可删除应用内的单条或批量数据；删除应用即可删除设备上的全部数据。卸载前如需保留，请先导出备份。
六、隐私政策更新
我们可能会不时更新本隐私政策。更新后将在本页面公布最新版本并注明生效日期。若政策发生重大变更，我们将在应用内同步提示。
七、联系我们
如您对本隐私政策或数据安全有任何疑问，可通过以下方式联系我们：
最后更新：2026 年 8 月 24 日
记课时 Privacy Policy
Effective date: August 24, 2026
记课时 (the "App") is developed and maintained by an individual developer ("we"). This Privacy Policy explains how the App collects, uses, stores, and protects your information.
We take your privacy seriously. The core design principle of the App is: your data stays only on your own device. We do not collect, upload, or share any of your personal data.
1. Information We Collect
The App does not collect any personal data.
- The App requires no registration, no login, and no account information such as phone number or email.
- The App contains no advertising SDKs, analytics SDKs, crash-reporting SDKs, or third-party tracking SDKs.
- The App has no network access capability and does not transmit data to any server.
All information you enter in the App (student names, course details, class-hour records, payment records, notes, etc.) is stored only in the local database on your device (Room database and local configuration files), fully under your control.
2. How We Use Your Information
Because we do not collect any information, there is no use, processing, or analysis of your information.
3. Sharing and Disclosure
We do not share, sell, rent, or disclose any of your information to any third party.
4. Local Storage and Security
- Your data is stored only in the local database and configuration files on your device, and is deleted when the App is uninstalled.
- The App offers an optional "Security Lock" feature (PIN code or device fingerprint) to prevent unauthorized access. PIN codes are stored locally as salted hashes; fingerprint verification is handled by the Android system biometric framework, and the App never obtains, stores, or uploads your fingerprint data.
- Because all data resides on your device, its security depends on the device's own system safeguards (e.g., screen lock, disk encryption). We recommend enabling system screen lock and disk encryption on your device.
5. Data Export, Import, and Deletion
- Export: You can export all data as JSON or Excel files at any time via "Settings → Export Data / Export Excel" to a location of your choice.
- Import: You can restore data from backup files via "Settings → Import Data / Import Excel". Import uses the system file picker and only reads the files you explicitly select.
- Deletion: You can delete individual or batch data within the App; uninstalling the App deletes all data on the device. If you want to keep your data before uninstalling, please export a backup first.
6. Changes to This Policy
We may update this Privacy Policy from time to time. The latest version will be published on this page with its effective date. If there are significant changes, we will notify you in the App.
7. Contact Us
If you have any questions about this Privacy Policy or data security, please contact us:
- Customer service WeChat ID: justwhdx
Last updated: August 24, 2026