Expense Privacy Policy

Effective Date: October 18, 2026

Welcome to Expense - Money Manager. We understand the sensitivity of your financial records and prioritize your privacy above all else. This Privacy Policy explains how our application handles your data.

Please read this policy carefully before using the app. By using the app, you understand and agree to the practices described here.

Highlights

Your transactions, account balances and budgets stay strictly on your phone
No sign-up required, zero internet permissions (no android.permission.INTERNET), and zero data uploaded
Completely free of advertising, tracking, and third-party analytics SDKs
Optional passcode and biometric protection with salted SHA-256 local hash storage
Changes trigger local automatic backup; manual JSON/CSV exports use a location you choose. Exported files are not additionally encrypted

1. Information We Handle

Transactions: Amounts, categories, accounts, dates, and optional notes for expenses, incomes, and transfers.

Accounts: Names, icons, types (cash, bank, credit card, etc.), and balances you configure.

Budgets & Categories: Monthly spending limits, category budgets, names, and icons.

Passcode Protection: If app lock is enabled, your PIN is securely salted and hashed (SHA-256) locally before saving. Plaintext passcodes are never stored.

App data is stored in local app-private storage (Room database and SharedPreferences). The app has no INTERNET permission and does not itself send records to our servers. App lock does not encrypt the database or exported files. File providers you select and Android system backup may store or sync data according to your settings, as explained below.

2. Storage, Backup & Export

Your financial data stays on your device until you delete items, clear data, or uninstall the app.

After data changes, the app attempts to write an automatic local backup to Download/Expense. Android 9 and earlier require storage permission. Permission denial or a write failure prevents a successful automatic backup; its status appears in Settings.

Manual JSON backups and CSV spreadsheets are saved to the location you choose in the system file picker. If you choose a cloud file provider, that service may sync the file under its own privacy policy. Backup and export files are not additionally encrypted; keep financial exports private and secure.

Android may back up eligible databases and settings to your own account or transfer them to a new device according to system backup and migration settings. This is a system service; we cannot access your system backup.

3. Device Permissions

Biometric Authentication (USE_BIOMETRIC): Used strictly to verify your identity with fingerprint or face unlock if you enable this feature. The app does not collect or access raw biometric data.

Storage (WRITE_EXTERNAL_STORAGE, Android 9 and below only): Used solely to save local backup files to the public Downloads folder on legacy Android versions. Android 10+ uses MediaStore without requiring permissions.

4. Third-Party Services & Sharing

The app contains no third-party ads, tracking, or crash analytics SDKs.

We never sell, lease, share, or disclose any of your data to third parties.

5. Contact Us

If you have any questions or feedback regarding this Privacy Policy, please contact us at:

Email: [email protected]

Website: https://dev.licheng.tech

记账本隐私政策

生效日期：2026 年 10 月 18 日

欢迎使用记账本（Expense - Money Manager）。我们深知财务数据对您的重要性，并始终将您的个人隐私与数据安全放在首位。本隐私政策说明本应用如何处理您的信息。

请您在使用本应用前仔细阅读本政策。使用本应用即表示您了解并接受本政策的全部内容。

简要说明

您的账目流水、账户余额与预算设置仅保存在您的手机本地
应用无需注册登录，不申请网络权限（无 android.permission.INTERNET），绝不上传任何财务数据
应用不含任何第三方广告、商业跟踪或统计 SDK
可选应用密码锁与指纹面容保护，密码采用盐值哈希加密存储于本地
数据修改后自动备份到本机；手动 JSON/CSV 导出保存到您选择的位置，文件不额外加密

一、我们处理的信息

账目记录：您记录的支出、收入与转账金额、分类、关联账户、发生日期及备注文字。

账户信息：您创建的资产账户名称、图标、类型（现金、银行卡、信用卡等）及账户余额。

预算与分类：您自定义的月度总预算、分类限额、分类名称及图标。

应用安全设置：若您启用了应用锁，您的 PIN 码和恢复码只以加盐哈希（SHA-256）形式保存在本地，用于本机校验；应用不保存明文 PIN。应用锁不对账目数据库或导出文件加密。

应用中的数据保存在本机私有存储（Room 数据库与 SharedPreferences）中。本应用未声明网络权限，不会自行把账目发送到开发者服务器。您主动选择的文件提供程序与 Android 系统备份可能按您的设置保存或同步文件，见下文。

二、数据的存储、备份与导出

您的财务数据将一直保存在您的设备中，直到您主动删除单条记录、重置数据或卸载应用。

应用在数据变更后尝试自动写入本机 Download/Expense 目录；Android 9 及以下需存储权限，拒绝权限或写入失败时自动备份不会成功，设置页显示状态。

您可以手动导出 JSON 备份或 CSV 表格，保存到系统文件选择器中选定的位置。如果选择云盘等文件提供程序，文件可能由该服务同步，适用该服务的隐私政策。备份和导出文件没有额外加密，请妥善保管，避免分享含财务信息的文件。

Android 系统可能按照您的备份和设备迁移设置，将符合应用备份规则的数据库及设置备份到您自己的账号或传输到新设备。此功能由系统提供，开发者无法访问您的系统备份。

三、权限使用说明

生物识别（USE_BIOMETRIC）：当您主动开启应用锁并勾选指纹/面容解锁时，调用系统系统级生物识别 API 进行身份核验。本应用不收集或存储任何生物特征原始数据。

存储权限（WRITE_EXTERNAL_STORAGE，仅限 Android 9 及以下）：仅用于在低版本 Android 系统上将数据备份文件保存至公共下载目录。Android 10 及以上系统通过 MediaStore API 写入，无需任何存储权限。

四、第三方 SDK 与数据共享

本应用不集成任何第三方广告平台、数据统计、分析或社交分享 SDK。

本应用不会出售、租借、共享或向任何第三方披露您的任何财务与个人信息。

五、联系我们

如果您对本隐私政策有任何疑问、意见或建议，请通过以下方式联系我们：

电子邮箱：[email protected]

官方网站：https://dev.licheng.tech