Lekh Diagram is a sketch recognition diagramming app. It recognizes your rough sketches and convert them into regular shapes (like circle, rectangle) and connections.
The latest update of the app supports iPhone.

App store link: https://itunes.apple.com/us/app/lekh...576124115?mt=8

Video demo:


more info: Lekh Diagram | www.avabodh.com