合庫mATM is a free Android app developed by Taiwan Cooperative Bank Ltd. that falls under the category of Business & Productivity, specifically Finance. The app allows users to perform account-based transactions on their financial chip cards (both self-owned and cross-bank) using a specialized mobile card reader connected to their Android device via a Micro USB OTG cable or adapter.

Apart from this, the app provides various services like fund transfers, balance inquiry, password change, and much more. It also has a tax payment section that offers several tax payment services such as car tax, property tax, business tax, and more. The app also enables users to pay their credit card bills, utility bills, tuition fees, and insurance premiums.

The app has various permissions like external financial card reader, camera, mobile data, storage, and more. These permissions are essential for using the app's services. However, users should note that when using the app, some functions require access to sensitive data, including transaction information, account details, and personal information.

Overall, the app is a convenient and secure way to perform financial transactions. Users are advised to install genuine antivirus software to enhance the security of their mobile devices.