Android/Iphone learning game app

I'm looking for someone to write BOTH an android and an ipod game app. This app. will essentially lock the phone from use and require the user to solve a series of math problems correctly to unlock it. If the phone is turned off while the app is running, it should not allow the phone to unlock when turned back on. The app will have settings for difficulty, number of problems required to solve before unlocking, length of time between lockouts, and a feature to allow for emergency phone calls. These features are described in more detail below: 1. difficulty: The difficulty setting should specify the number of digits to be used in the problem, as well as allowing the user to select between +,-,/,* operands. For example 2 digit multiplication: the problems should be 23 x 12. The program should randomly generate problems and not allow the phone to unlock until the correct answer is met. An interface should be designed to allow for easy entry of the answer. 2. number of problems required to unlock the phone: This setting should specify how many problems must be successfully answered to unlock the phone. 3. length of time between lockouts: The user should be allowed to set the recurring time period before the user is challenged to answer questions before unlocking the phone. 4. emergency phone calls: User should be allowed to either thumbswipe or enter a pre-determined password in order to unlock the phone/terminate the program, and the user should always be allowed to dial pre-determined phone numbers without the entry of a code or swipe (such as 911 or other entries). I expect full code/function documentation and best programming practices applied so that future changes/additions can easily be made by anyone.