Secure Card Management is a free Android app developed by 분홍사자. It falls under the category of Business & Productivity, specifically Finance. The app allows users to input their security cards and select the associated app for integration.

Once the integration is complete, a pop-up widget is automatically displayed when the associated app is launched. In case the pop-up widget does not appear, users can enable it by going to Settings -> Accessibility -> Secure Card Management (Service).

From the pop-up widget, users can enter their password and input the desired number for retrieval. Clicking on the retrieved number allows users to switch between the first two and last two digits.

Please note that when backing up and restoring, the app requires permission to use the SD card. Users are advised to copy the "pinklion.securitycard" folder to the device they wish to restore.

An additional feature of credit card management was added on April 9, 2016.