Add a feature to an existing iOS app

Hello, The new feature is part of an existing weight loss app. I call the new feature "weights history" . The "weights history" implementation will extend an existing implementation of a weight chart. The current weight chart displays a graph with weights and dates as axes. The new extended weight chart will let the user view a history log of his past weight records in a table view. The user will be able to edit or delete past weight values (or their dates). The project requires integration with an existing (small) code – Two controllers and two interface builders, It does not require any knowledge or integration with graphs library. The project should work on iOS 4.3.1- iOS 6.1 iPhone 4,4S,5 I added user interface files and detailed specifications file. Best Regards, Anat