iPhone Survey App update: Add "branching" (the ability to jump from one question to another based on user's answer)

This project will be one of many projects, this being the initial and small change. Eventually, would like to reprogram the entire app. Also candidates with skills in Android App skills, will be huge bonus, since in the future, also looking to move iPhone/iPad App to also work on Android phones. Basically the app is functioning and running, but the request from the client is to add functionality for the ability to branch questions. For example, if a user answers "Yes" to question #2, the survey would jump to question #5 versus if the user answers "No" then the user would continue to question #3. There is currently the ability to customize questions, so this would be added to existing program. Please include previous examples of iPhone/iPad apps previously development. The short list of candidates will be provided with the code to further determine if they can fulfill requirements based on their bid, so please be accurate. This App was developed from a larger App development company here in Australia, so looking for someone who is knowledgeable in proper coding standards and practices. Also, I am an IT Manager/Project Manager with 10 years experience, so only serious applicants apply and any over zealous bids will be flat out rejected and ignored in the future. Also, I have had issues with people who have contacted me (and subsequently client) via phone and those people that do will be flat out rejected and reported to Freelancer and blacklisted from any future work. Thanks for your time :).