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The project is for writing an iOS app that functions exactly like the following Android app: https://play.google.com/store/apps/details?id=net.wiagames.origami
The Android source code and API are available if you need it.
There are two versions of the application, one that is free and ad-supported and one paid. Both need to be implemented for iOS, with advertising for the paid version included in the free version.
The app uses a web service to upload new content. The iOS version should work the same way Feel free to ask questions if anything is unclear. When bidding for this project please provide examples of other iOS apps you have developed.