Two months ago, I started building an iOS app for my daughter. This week, I shipped it. MapSprout is a US geography app for kids — they learn the 50 states + DC through quizzes and a 3D map road-trip mode. It took 67 days from first commit, 920 commits total, pure SwiftUI with zero third-party dependencies, and it's in Apple's Made-for-Kids 9–11 category. Here's what shipping solo actually taught me. Why I built this in the first place My daughter Emma is at the age where she's starting to learn US geography. I looked at what was on the App Store. Nothing felt right. So I built the thing I wanted her to have. The build 67 days from first commit to launch. 920 commits. Six commits on day one — welcome screen, home screen, state list, and a first cut of the quiz all landed on the first afternoon. The shape of the app didn't really change after that. Everything since was polish, content authoring, and the App Store machinery itself.…