CONGRATULATIONS 1st of all for a great task in process.
id like to say that the export option should be added asap which ik is gonna be there in main launched app.2nd is to insert images and to view/annotate other pdfs. 3rd is to allow text as well, 4th is add more colors to the pens and 5th is to add shapes( im only getting a rectangle even if i draw and hold a circle). Thats it cheers!