graphviz.christine.websiteRead time in minutes: 1
I have been using an online copy of GraphViz for a while to make my own diagrams online. I have forked this to here and added basic Progressive Web App support. Here is the link.
Here's an example usage video.
Let me know how this works for you. Hit share->add to home screen in iOS safari to add this to your home screen as a pseudo-app.
If you ever wanted to know how to convert an existing index.html app to a progressive webapp, here's how you do it.