Why not link directly to the app (https://www.trackiem.com/)? I clicked through and the landing page is pretty good. Only thing I wasn't clear about was what do the visualizations look like? Having a few actual examples of various types of graphs and what they look like would be helpful.
Thanks for the feedback. I submitted the direct app for Show HN few days ago and didn't make it well. I thought a write-up would help clarify the intent, and wrote this one up.
I'm planning to have a "demo" version up an running by this week end so as users can try before signing up.