Contact / 联系方式

• Email: [email protected]
• Response time / 回复时效: We usually reply within 2 business days. 我们通常在 2 个工作日内回复。

FAQ / 常见问题

1) Where is my data stored? / 我的数据存在哪里？

EN: All records are stored locally on your device. Cost Notebook has no account system and does not upload your data to any server.

中文：所有记录仅保存在你的设备本机。App 没有账号系统，不会上传任何数据到服务器。

2) How do I back up or move my records? / 如何备份或迁移记录？

EN: Use CSV export to save a file, then use CSV import on the new device. Import is free; export requires a one-time or lifetime unlock.

中文：用「导出 CSV」保存文件，在新设备上用「导入 CSV」恢复。导入免费，导出需购买单次或终身解锁。

3) Why does CSV import fail? / 为什么导入 CSV 失败？

EN: Only CSV files exported by Cost Notebook (or with the identical column structure) are supported. Please re-export from Cost Notebook and try again.

中文：仅支持由本 App 导出、或列结构完全相同的 CSV 文件。请重新导出后再试。

4) I bought the lifetime unlock but it's gone. / 购买了终身解锁但失效了

EN: Tap Restore purchases while signed in to the same Apple ID used for the purchase. A network connection is required. Single-use credits are stored on the device and cannot be restored after switching devices.