If it is in your sketchbook, it belongs in this thread. Feel free to recommend and ask about pens, pencils, sketchbooks and anything related to this thread's topic.
>Recommended app:
https://play.google.com/store/apps/details?id=com.notebloc.app
https://itunes.apple.com/us/app/notebloc/id1077023687
>Recommended app:
https://play.google.com/store/apps/details?id=com.notebloc.app
https://itunes.apple.com/us/app/notebloc/id1077023687