Straight from Hong Kong, Paxifi has rolled onto the App Store. It's designed to let taxi and limo drivers sell convenience goods to their customers easily during their trip. These can include things like snacks, drinks, headache tablets, umbrellas, sunscreen, and so on. Paxifi can basically turn a cab or limo into a mobile store.
All drivers have to do is register their store, choose what they want to sell, and download a sticker that contains a QR code. Paxifi provides riders a catalog to browse through as they ride and keeps track of sales to make it easy to see results.
You can check out Paxifi for free on the App Store.