I just found about the rather experimental chaarts. It enhances the standard html <table> and turns it into different charts. Complete with hover text and animations.
It seems to be pretty accessible. And if the user agent doesn’t support the fancy css it degrades gracefully to the original <table>
Doesn’t appear to show any charts on Chrome for mobile…
Seems to be a responsiveness issue, because it goes away in landscape mode, and the charts show.