Fair warning: this post is going to be honest in a way that a lot of "I used AI to build X in Y hours" posts aren't. There will be no inspiring productivity claims, no screenshot of a finished product with a clean UI that took three hours of prompt iteration to actually look like that. I genuinely tried to build a working mobile app in 24 hours using AI as the primary builder. Here's what happened. The Setup I had an idea I'd been sitting on a simple habit tracker, nothing novel, but I wanted something with a specific feature set I'd never found in any existing app: habits grouped by life domain (health, work, relationships, personal growth) with a weekly rhythm instead of a daily one. Weekly habits, not daily. Sounds simple. Apparently, nobody has built this exact thing in a way I like. Tools I used: Claude for architecture planning and code generation, Cursor for the actual editing environment, and FlutterFlow for the UI scaffolding because I wanted to move fast on screens.…