케이에스체크 IC is a business and productivity app developed by 주케이에스넷 for Android devices. It offers a convenient way for businesses to use the functions of their card terminals on their smartphones.

By connecting the KSR-03 (KSN Bluetooth card reader), users can accept credit card payments and send payment information to customers via SMS and email.

The app's key features include card and cash receipt payments, point-of-sale cancellations, transaction history viewing, and integration with other apps for proxy approval.

It is important to note that users should always update the application to the latest version to ensure proper functionality. Additionally, sending transaction receipts via SMS may incur communication charges. For inquiries about purchasing the KSR-03 reader, users can contact 주케이에스넷's sales representative. For merchant registration and detailed usage instructions, users can refer to the '케이에스체크IC 매뉴얼' in the IMS terminal resource center.