Math tutoring iPhone/iPad/iPod app

It is a math tutoring/teaching software program. I currently give away the Windows edition for free on TeachersPayTeachers. I want to turn it into an iPad/iphone/ipod app for math tutors and homeschoolers, and add a little more functionality to it than it has in the Windows desktop version. **Core features**: * Ability to generate randomly sorted sandwich recipes, with ingredients broken down by calorie count. The Windows app already does this. * Ability to create addition, subtraction, and fractions worksheets using these randomly generated recipes. The Windows app doesn't do this. * Built-in error-check to allow teachers/tutors/students to check their work. The Windows app doesn't do this either. * Database is hard-coded into the software. **You can download the Windows version free on TeachersPayTeachers:** [login to view URL] **Google spreadsheet containing data for database:** [[login to view URL]][1] **You can see the specs for the Windows app here:** [login to view URL] **The app MUST include the extra core features described at the beginning of this summary.** Winning bid should include your design and/or demo, summary of how you will create the app. I will not choose someone based on a resume or CV, but if you have designed similar iOS mobile apps before, you may include links to those in your bid.