You can build an app. The hard part is everything around the code. This is a practical iOS-first system for solo developers who want to turn one clear problem into a smaller v1, a verified App Store release, a useful acquisition test, and a sensible next decision. It gives you a repeatable loop for: choosing a problem with a clear user and believable payment path scoping a first version around one successful user moment briefing an AI coding agent with a real definition of done preparing and verifying the App Store release packet turning one product flow into a useful content batch reading reach, listing engagement, downloads, activation, retention, and purchases in order running a weekly review without treating pending analytics as zeros Included: seven written lessons, seven copyable Markdown templates, a Manifest setup guide, a weekly-review prompt, and a personal-use license. This is not a programming curriculum or a promise of downloads or revenue. It is the operating system around the build. For the backend boundary, pair it with Ship the Backend. For turning real footage into distribution, see The Short Video Factory. For ongoing App Store measurement, see Manifest.