Yes, these are all good points. I really want to find a way to keep the online version for free. The advantage of the download (desktop version) is that users can run in a borderless window with six color schemes and the ability to close the side palette.

I'm sure there are many students in poor countries that enjoy having a nice powerful online calculator that is easy to use, but nice is not a good business model.

We don't have a good way to prevent pirating and my thinking was that even top products like Adobe get cracked pretty quickly and distributed (so I figured it was a lost cause...)

Anyway, we have plenty of great ideas for additional features that we can add into the palette. Maybe we make a "pro version" that has these extras...