That's odd - while browsing it just now I noticed Autodesk's Sketchbook has both "Pro" (paid-for) and "Express" (free) versions on there. Seems like they're not

That's odd - while browsing it just now I noticed Autodesk's Sketchbook has both "Pro" (paid-for) and "Express" (free) versions on there. Seems like they're not applying that rule consistently, if at all.