Are there Android and Windows Phone ports on the horizon? This App would pair up nicely with active digitizers such as Samsung's S-pen and Surface Pro's pen inp

Are there Android and Windows Phone ports on the horizon? This App would pair up nicely with active digitizers such as Samsung's S-pen and Surface Pro's pen input. On a more skeptical note, how does it compares with Evernote's Skitch and Omnigraffle?