* The initial stage should be a prototype that can be finished in two weeks. It will be used to update requirements/design and decide on GO/NOGO
* You can specify the job as cloning an existing app. It should be doable in two weeks. Example: The puzzle game in Android. You could use the code produced to learn new things. Or you could ask them to clone Save My Cheese. It might give you fresh ideas about how to solve the problem.