Vehicle Number Trace

We are developing a children application and would need a developer to assist with the programming. ‘Vehicle Number Trace’ is a simple application targeted towards children aged 1 and above. The screen will display a number which player will have to trace with a vehicle. Upon completion the number and vehicle will be read out and applause will be heard. The first 5 numbers will be free and there will be an in-app purchase to unlock the rest. In total, there will be 20 numbers to trace. Images and sounds will be provided for this application. Developer must have experience in successful application development and in particular, in app purchase functionality. You will also be required to test the application aggressively for bugs and be responsible for any updates due to programming error if required. I will keep 20% of the payment in milestone upon successful publishing of the app for a period of 14 days to ensure that the app is free of programming bugs. Please submit your best 3 apps that you have developed for consideration. We need for both iphone and ipad.