Do we have the dev here?<p>I love the idea of a fast and tiny calculator notebook. I was a big Mathematica user (as long as my uni paid for the crazy expensive licence) for even simple calculations, and this would almost scratch my itch.<p>I'm saying almost because it needs a bit more work, at least some more quantities and units, like speed, voltage, power etc. And it all breaks down if you try do a calculation where the quantity/units change, i.e. the units disappear (because the app doesn't understand the formula) and you can't use the conversions anymore. I'm not saying it's a bad thing or that I absolutely need it, but the $24 price is no joke.