My money is CepPOS; Developed by Param, it is a state-of-the-art application that enables Param member businesses to receive face-to-face payments. It turns any Android device with NFC feature into a POS device without the need for physical POS devices and allows you to receive contactless and fast payments from anywhere you want in seconds.
Param CepPOS is a mobile application that only serves to receive payments. It cannot be used alone without the main application. It easily integrates with your business's own mobile application.