It’s a zip with a self-contained HTML file inside. As long as you can extract a zip and open an HTML file, you can run it mobile. I believe Google’s “Files” app (wonderful name) can extract zips, and Chrome on Android can open the resulting HTML file? Not sure what works on iOS.
Edit: It’s the same process as with the regular zip you can download for free, so if you’re unsure, you can try out that first.