Apps for revision

*I am looking for a software designer to make several apps for GCSE and A Level students to revise with, suitable for iPhones, iPads and Android phones. As I am a complete novice I will be looking at a designer that can assist in all of the aspects to the build and* *implement of the app. Students can choose from a menu of areas to study**, with explanations of key areas in the exam followed by a Q&A section, which will be in the format of a question with multiple choice answers. I will also want to include progess bars and areas of improvement. **Although unorthodox,* *I will be more inclined to work on a split of the money recieved from the apps rather than a one time payment. *