Android App Clone

I have to make a app that is very similar to the following app [login to view URL] Here is the premise of what the Android app does; It gives you random questions that you have to answer within a certain time, if you miss a question you get penalized by adding 5 seconds to your time. The purpose is to answer the most correct questions as fast as you can. Your time is then recorded to everyone in the world and erased everyday to restart. I want to make a free and paid version of the app. In the free version you can play for 4 minutes a day and then you are prompted to pay or buy the full app. Unlike most freelancers I am very serious about hiring a development team; you can check my feedback to see that I have hired before off Freelance. Preference will be given to those with a portfolio and positive feedback. I recommend that you download and play the app to get a feel for it. I would also like it if you can make this a iphone app as well.