Is this link up here for the content or for the tech? I don't get it either way - the app is nice, but it's built using another system (and I'd have lots of suggestions to improve how it renders on this site).
In terms of content, it's not clear whether the network model is one taken from the published literature, or something the author created ad-hoc (feels a bit like the latter). And I don't get the point of assigning network centrality measures to topics like "facing fears" without explanation (seems like they came with the app, which was designed for a different purpose, and the author didn't know how to take them out, or didn't bother).
I have a therapist friend who's shown me some very useful, evidence-based cognitive models. They do come with nice visual explanations too, and putting those into a web app has been on the back of my mind since - but they looked quite different.