Sproutiful was an AI-driven gut-health app. I took it from concept to a working proof at usTwo.
It wasn't a client project — it was built to show that iOS and AI capability could be combined in one place, and it was used afterwards in new-business conversations to make exactly that point.
Prototypes like this are their own discipline. The goal is to make the idea real enough that someone can hold it and decide, and then stop. Everything you'd do to make it a product is work you haven't been asked for yet.