Cool idea, I had a similar hitch to scratch and have been playing with the idea to build something like that (for personal use, but ended up using https://hay-kot.github.io/mealie/). I'm in Berlin and I wasn't aware you guys were already operational here.

A couple of notes: I signed up for the trial and answered the questionnaire. To me, it is not clear what happens next. I didn't receive any welcome/confirmation email.

Also, since I'm based in Germany, I would have expected a reference to German supermarkets (Rewe, Edeka, etc.) but the home page only shows American stores. For a moment, I thought this was a US-only service.

Good luck and looking forward to try out the service.