Simple iPhone App - Data from API

We are looking to have someone help us build an iPhone application - though are open to proposals to build android versions also. The application will make use of an existing widget (see [login to view URL] and the sample source at [login to view URL] and the iframe version at [login to view URL] This widget is used by our customers to display available appointments for sale on their website. There is no provision to change the upstream code used by this widget (at this stage). The application will be a very simple one, with a home page (static image), and two further pages (see attached pdf) 1. the unbooked widget for a specific vendor allowing users to view and book appointments 2. google map and contact details for the vendor It is anticipated that we will extend the functionality of this app in time, and we will be wanting the ability to create multiple versions of this app for each of our merchants. Please provide an outline of your approach, deadline for completion, and budget for this first piece of work only (initial simple app). Thanks Jeff Dusting