Sổ Ghi Nợ SONO is a free Android app developed by Quick Apps Inc. It offers a convenient and secure way for small businesses to manage customer debts. With this app, store owners can replace traditional paper ledgers with electronic ones, ensuring accurate and up-to-date records of transactions.

The app provides several useful features for debt management. Users can easily add customers to the ledger, edit customer information, and record transactions. Additionally, they can manage debts with suppliers and make phone calls or send direct messages to customers through the app. The interface is simple and user-friendly, making it easy to navigate and manage accounts.

Sổ Ghi Nợ SONO is designed specifically for smartphones and is completely free to use. It is a reliable tool for small businesses, whether they are located in rural areas or major cities like Hanoi, Ho Chi Minh, or Da Nang. Various types of businesses can benefit from this app, including phone card shops, grocery stores, bakeries, jewelry stores, pharmacies, clothing stores, food stalls, tea shops, and personal financial transactions.

Please note that additional features are planned to be implemented in the future, such as managing multiple ledgers on different devices, setting payment reminders for customers, and securing the ledger with a PIN code.

Overall, Sổ Ghi Nợ SONO is a valuable app for small business owners in Vietnam, providing a secure and efficient way to manage customer debts and improve financial management.