Dear Mohamed, I am programmer certificate, I have extensive experience developing similar mobile applications, I read carefully the document that is sent, it is quite clear, I could add to the application to make it work with a database, could generate a web data feeder so you can load the information about prices even with the option of loading it from an Excel file if it is that today uses this format for pricesfor the project would provide you my email, skype, facebook or other courier service that uses so that at all times can give follow-up to his project, also I habilitaré a web site so that you go testing load prices, in 1 week as it would have a version beta to go testing it, will be a pleasure to work with youI am at your service, best regards, GCG