Hmm, being able to narrow down the scope would be useful, e.g. have a series of checkboxes for Latin, Greek, math symbols, etc. (presumably pi would be eligible if you check either Greek or math)

I can get it to recognize pi fairly consistently if I include a serif on the right leg; although I still haven't been able to get it to rank pi as the first choice.

remember that's it's matching against what is basically an SVG image of a specific font's version of pi, not "how people write pi": draw pi, instead of writing pi, and it'll pick it up pretty high up in the list of matches. https://i.imgur.com/k4AnUme.png

I drew it curved like this https://upload.wikimedia.org/wikipedia/commons/thumb/0/09/Pi... and it was suggesting Unicode characters comprised entirely of right angles (the suggestions themselves changed each time)

I got pi as about the seventh choice.