支付联盟 is a mobile app designed to provide professional services for POS machines. It is available on the iPhone platform and is completely free to use. As a utility and tools app, it offers various features to assist with the management and operation of POS devices.

With 支付联盟, users can access the POS Mall to make online purchases of POS equipment. The app also allows for online activation and transfer of POS devices, providing convenience and flexibility for businesses.

One of the key features of 支付联盟 is the ability to view device transactions anytime and anywhere. This feature allows users to stay updated on their POS device activities and monitor transactions efficiently.