Self checkout app - App project

Mobile app project description

Hi There,

I am looking for a developer to develop an app for self checkout at shops and supermarkets, plus i will like to add metro and bus card functions where people can directly scan their QR code to the machine and pay from our app. like replacing Bus and train cards with our app technology. Also, I would like to add functions to pay at Petrol stations. Please let me know the price and also any such app you have developed previously.

Main Features.
Self checkout to shops and supermarkets.
Pay at petrol stations from the car(pay in car). Self checkout.
Metrol cards like bus, train and ferry tap in and out functions.