Charity Project (front and backend development needed)

The app is called The Charity Project and the concept is to create an app for people to have a quick and easy way to support various small projects. Since the majority of people use their iphones/androids regularly, the goal is to accomplish this through using the in-app purchasing system for people to purchase digital badges, the proceeds of which will go to fund that specific project. I've attached screenshots of the design we have worked out so far. You'll notice that most of the text and images are just sample for now. But an example of a project would be: helping a child who needs a wheelchair and the family can not afford it. The app itself will be free, and will feature several different current projects. People can then view specific blog posts, media (video & pictures), amount raised to date, and a support page in which they can download that digital badge as an in-app purchase for that project. All content will be web-based, and will be pulled from a content management system (such as wordpress) this will allow us to make it dynamic so new projects (and updates to existing projects) can be uploaded without the users having to install an update to their app on their phone. We are looking for a developer who can handle the iPhone/iPad/Android interface aspects as well the CMS, server and database, and we need someone with experience using in-app purchasing. However, we would could work with a developer to only create the phone interface(s), while we handle the CMS, server, and database. Screenshots of the app design and flow have been attached. Please submit samples of previous work you have done and list specific examples of in-app purchasing projects you have worked on.