This probably sounds daft, but I was trying to figure out on the site what platform it ran on. It doesn't seem to say "in browser" - so I'm wondering if it's W

This probably sounds daft, but I was trying to figure out on the site what platform it ran on. It doesn't seem to say "in browser" - so I'm wondering if it's Windows or Mac or ...? Since it is in-browser there's then no detail on what the scope is - where are the spreadsheets stored? How are they shared? Do I host it on my server? Are they stored on your server ? Can I embed it on an existing page? Can I update cells via JavaScript? Or websockets? And so on. Some of the above is inferable from the comments here, but not all. Congratulations on a cool project - but you may want to "set the scene " as it were for prospective users.