I'm searching for a library that handles image/pdf annotations and LEADTOOLS does a really good job of this on iOS in objective C in the proof of concept that I worked with. Searching around, I haven't seen much about people successfully binding it into Xamarin. Mostly I've just seen people asking for help with the Android bindings, nothing for iOS. Has anyone tried this? Or does anyone have suggestions for a different annotation library that will work more easily with Xamarin iOS?