Does anybody know what they’re using to render the equations? I know that WebKit has MathML support, so maybe they’re using parts of that codebase? It would be neat if they released some APIs in iOS/macOS.
I think its MathML webkit rendering, with the LaTex being translated to MathML
They've had this support out for iBooks Author for at least a year, and I'm sure you're right about using WebKit. Adding it to iOS is a pretty nice feature though.