The vast majority of us have, often begrudgingly, learned to deal with the touch-based keyboard, but with commodities such as the stylus very much alive and kicking thanks to the S Pen and others, there's still plenty of hope left yet for those of us less inclined to change. While Samsung markets its S Pen as a tool for the creative, it also lauds its note-taking abilities, no less with the oversized 'phablet' known as the Galaxy Note. Its extensive fan base shows that there certainly is a market for making digital annotations, and as such, one iOS developer has come through with a different approach, offering an app which solves calculations you've written with your hand.