IPhone App Trivia Game with GPS and maps integration

I'm in the need of a programmer that can build an Iphone app and depending on that we'll possibly ask for a second version for Andriod. This project is for a non-profit organization the app consist of the following: -the user must create an account with username and password to start using the app -User must create a profile and join a group or team of users already in the system -User is able to search team members, teams, and be able to create a new team name. -Once the user is registered, he/she is able to play a trivia game based on points by answering correct questions, the game is played in teams/groups -Tour guide: using gps technology, the app will pop a message and let the user know when he/she is passing by a historical landmark - Important dates: the app will hold a calendar of events which will let the user know if that day is a historical day or just to notify about events or other important dates -Fundraising: this will allow the user to make a donation to the organization by allowing them to donate from their phones, and will also hold paid sponsorship/advertising banners. BACKEND: admin should be able to manipulate the following from the backend: -manipulate users -manipulate teams -add remove trivia questions, possibly linked to important dates or specific historical landmark -add remove historical dates -add/remove location of historical landmarks, be able to map to a location using GPS -Fundraising page, be able to integrate a way to process donations, possibly paypal or other merchant account -be able to add/remove sponsors/banners The person selected for this project will work hand-to-hand with a creative team, which will allow a better understanding of the project, and will also provide any assets, UI design, and UI structure. We'll need a portfolio of apps done in the past, we'll review them and make a final pick based on that. ONLY PROGRAMMERS WITH EXPERIENCE, WE REQUIRE YOU TO SHOW PAST PROJECTS THAT INVOLVE SOME OR ALL OF THE REQUIREMENTS THAT WE'RE SPECIFYING FOR THIS PROJECT. A test or demo is also required prior to starting the project, to estimate timeframe and quality of the product. After completion of this project we'll possibly require an Android version which will be a separate project. Thank you for taking the time to read the description of the project.