Sổ tiết kiệm play online

Passbook application has the following features:
- Add new, edit, delete passbook information
- Automatically notify how many days, how many months are due
- Automatically calculate interest and sum both principal and interest
- Show list of passbook
- Statistics of total principal and total interest of all books
- Adjust the order number to display the books for easy management
- Default login account: admin/123456
This is a very useful app for managing savings for the future.