Smart 어음정보 is a free Android app developed by 금융결제원KFTC, designed to provide a range of services for electronic bill transactions. The app offers six main features, including the ability to view transaction suspensions, report checks and bills, and access to various electronic bill types. In addition, users can register and view promissory note issuance information and access electronic bill-related inquiries.

Smart 어음정보 is easy to use and does not require any separate login to access the first three features, while the last three require a certified digital signature. Users can register and log in using their digital signature after agreeing to the terms of service and providing their date of birth and account number or business registration number.

The app requires essential access permissions to collect device information and use digital signature-related functions.