Two AI Agents Told Me My App Was Impossible. One Shipped It.

In December 2025, I asked ChatGPT how to automatically block apps after a timer expires in iOS. The response was clear: "Programmatic auto-blocking after a certain time is not supported by the Screen Time API. The DeviceActivity token is opaque and cannot be used once your app is closed or in the background." Claude said the same thing. So did Cursor’s AI. Three tools, same answer: your app is impossible. Four months later, Habit Doom is on the App Store. It auto-blocks apps. It works in the background. It does exactly what three AI agents told me could not be done. Here is what happened. ## What I Was Building Before I get into the AI tools, let me explain what made this app so hard to build. Habit Doom locks your distracting apps (Instagram, TikTok, YouTube) until you complete your daily habits. Not a timer. Not a gentle reminder. A hard lock at the operating system level. You physically cannot open Instagram until you have done your morning routine. To build this on iOS, you need Ap