Building an iOS app blocker with Screen Time APIs

I recently built a small iPhone app called FocusLock. The idea is simple: choose distracting apps, create a rule, and let the phone enforce the boundary when it is time to focus. I built it because I kept running into the same problem with my own phone habits. I did not need a bigger productivity system. I needed fewer tiny negotiations with myself. This post is mostly about the technical side: what it is like to build this kind of app on iOS, what Apple gives you through the Screen Time APIs, a