Enhancements to an existing iOS app

I have a special children eBook iOS app that embeds the users' photos into the story. This project will consist of a several enhancements to my app: #1 Custom zoom on scene - allow zooming in on different parts of the page. #2 Multiple face selection - save up to 8 personalized faces; on each page allow selection of one of these faces or randomly select between them. #3 Stop sounds of the page when flipping over to the next page #4 Tap and hold for settings instead of regular touch #5 Add Info overlay to first page and to face crop view #6 Add Return to first page to settings menu (the first 2 enhancements are not trivial. Detailed requirements will be sent to interested developers. The other 4 enhancements are simple). Application URL: [login to view URL]!/id489782818?mt=8 My budget for this project is $250-$500 and I am looking for an independent developer, not a company/agency. Bids that don't meet these 2 conditions will be disregarded. This project is also a long term relationship opportunity. I have many more projects coming up in my pipeline.