iOS Handy Man - Few Changes & Error Checking

We are looking for an experienced iOS developer to do a few tasks: Checking: 1. General checking for bugs & crashes 2. Check ad banner placement and ensure ads are correctly placed at the bottom banner slot. 3. Ensure multiple choice quiz system is working properly New Task: 1. Add 1 addition in-app purchase type 2. Delay the notification of an in-app purchase so 20 second of our video plays before user is prompted to pay. 3. Add an icon/graphic which shows when a user has already purchase an item Upload to iTunes Connect when completed App Type: iOS (iPhone/iPad) Freelancer should be happy to sign and NDA immediately and start work immediately