Basic Unity iPhone App needed

I need an experience developer to produce an effective but basic app that will display simulated 3D dice that can be rolled by the user by shaking the device or pressing a button on the screen. The dice should roll randomly and obey basic laws of physics including collision with each other and the sides of the device. The app will also need to include in-app purchases of additional styles of dice that will come pre-loaded on the app. Unity is suggested but not required. If you can provide a reason to use another method and show that it will result in a similar experience for the user, then I am open to reviewing it. Please provide examples of apps that you have created. All menus and dice styles will be provided by us. Modeling, randomness, physics and mobile programming will need to be provided by you. If all goes well, we will produce at least two variations on this same concept with the developer in the future.