Improve an iOS Camera App (Add Arabic Text/Font) to the images

I have an iOS Camera app, it's already live in the apple store, this app has camera and you can add effects to the images , the app link is here : [login to view URL] I have the full source code of this project, I want to update this app to allow users to Write Arabic Text with custom Arabic Fonts on there images, Example of what I want in the below link : [login to view URL] Also My app now is for iPhone, & want to be universal for iPad & iPhone . so you will not start this app from Zero, you just need to make improvements .