Show HN: Lekh Diagram – sketch recognition app for iPhone

If I may, here's some feedback...

But before that, let me explain why I'm interested in this kind of app. I like graphing stuff out - eg when reading some books recently I've drawn a visualisation of where the characters have gone in the story and what has happened. I've found there's no easy way to do this with most drawing/note taking apps on the iPad because you're restricted by the imprecision of your fingers when drawing. I've resorted to pad and pencil.

Therefore, the most important aspects for me are: - zoomable - ability to draw anywhere - ability to add a text note anywhere - neatening up (ie shape recognition) is a nice to have

So, feedback for your app:

- Zooming position - I expect the zooming to be centered on the midpoint between my touches rather than the top left of the screen/canvas.

- Zooming levels - I really want an infinite canvas...

- Line width - can there be a mode/setting where the line is the same width no matter the zoom level?

- Moving the canvas around - there needs to be some work on the gesture for doing this - after zooming in or out I found myself trying to use one finger to move the canvas and it of course drew a line. I know this is a really difficult problem! (I'm working on an iPad app myself with these kinds of UI problems). Perhaps, after zooming, switch modes to a move canvas mode and the user has to tap on the pencil icon to go back to drawing mode.

Anyway, keep up the good work and let me know if you want me to beta test.