B2B Portal improvement via app

It would be very beneficial to offer our customers the possibility to use an app in their mobile devices that can be use to scan the products (accessing the Mobile device camera) to the B2B Portal. Ideally an app that allow them to check out in the app too, or alternatively a more simplified app that would only be used to scan the barcodes of the needed products with quantities and pushed them  into their B2B portal logins. Once they finish scanning the products, only thing they need to do is log into the website in a browser, review the info and check out as normal.