Discuss the selection of mobile models and device manufacturers for your testing process Discuss whether testing is required on actual devices and what part emulators/simulators and desktop browsers can play in this process Discuss the economic/financial case for the proposed system. Identify potential revenue streams and costs. How much would these costs be for your proposed user base? How would you show that you are achieving this user base? Given how long it has taken you to develop what do you estimate technical development costs to be in hours? How would you promote your app and what kind of marketing should be employed?