Mobile app to help patients pay less for their prescriptions?

I am creating a mobile app that helps patients to compare medicine prices from different pharmacies. The way it works is patient use the app to take photo of their prescription and submit it to pharmacies, then the patient selects the best price returned from the pharmacies. I am just in the early stage of the development, however, got some questions would like to ask: - Anyone knows any apps like this already? - Would you use this app to buy medicines/drugs even there might be 5-10 minutes delayed in getting offers from the pharmacies?