This is a demo for their stroke to text converter. It took me a while to figure that out. I was hoping to run it local to my iPad, so I could create slides on my long plane rides. But they are also hitting their server to do the conversion, so it looks like I would need Internet access (and I wasn't able to make it work with ppt on my ipad anyway.) But it is a good demo.

I don't want to be that shameless, but https://onthesamepage.online does just that. I use it for sketching diagrams and mind maps daily. Not for presentations, but can export to PNG and SVG. Also kind of collaborative (I often use it alone, but from both tablet and laptop at the same time).