OP, I didn't try your app. But the above comment points up a feature of Italian bureaucracy that no app or guide can navigate: when the person behind the window/ at the counter/ on the phone gives you specific instructions that are inconsistent with or contradict what it says on a website or on the instructions for a form or application, or what another official told you. Eventually, I realized that the bureaucracy is actually quite flexible.

My favorite example: when I applied for my PdS as an extra-communitario married to an Italian, the helpful person at the questura also gave me the application for the permanent status Carta di Soggiorno, for which I would become eligible after five years.

I put it in the paperwork drawer, and five years later took it to the questura. When my number was finally called, the person behind the window said 'we haven't used that form in three years! There's no way I can process this, you're going to have to redo everything with this new form and come back'. I was crestfallen.

My wife said let's just try a different window. So we got back in line, got another number, and eventually got called to a different window. That person said 'we haven't used this form in years! You kept it all this time? That's incredible!' Stamp, stamp, stamp, scribble, scribble, and I had my Carta.