I really had hoped the app would be called "interactive block diagrams".

Must admit I am not that big a fan of such diagrams, and your app just might explain why: apparently they just don't tell you that much, hence the need for more attached information that you saw. Not sure if your solution really alleviates the problem. I might prefer to see the information without having to click around.

Ie if I see a larger text with captions for the individual parts, it might be easier for me to zone in on the parts that interest me.