Chapter 1: Can you really build an app without coding?

Yes, you can. But not the way most ads tell you. AI doesn't build the app for you while you watch. It's more like having a very fast developer who does exactly what you say, including the wrong things. Your job is to be a clear product manager. This chapter shows you what that means.

What changed

Until recently, building a mobile app meant learning Swift for iPhone, Kotlin for Android, and owning a Mac. Two things changed that:

• Expo lets one codebase run on both iPhone and Android. It also builds the iPhone version on Expo's own Macs in the cloud, so you don't need one.
• Claude Code is an AI that works inside your project folder. It reads your files, writes code, runs commands and fixes errors, all from plain-English instructions.

Together, they move the hard part from "writing code" to "knowing what you want and checking it works". That's a skill business people already have.

You only ever talk to Claude Code and test on your phone. Expo handles turning one project into two store-ready apps.

What AI is great at

• Writing the code for screens, buttons, forms and lists
• Connecting to services like databases and payment providers
• Explaining errors in plain language and fixing them
• Doing boring setup work you'd never figure out alone

What AI is bad at

• Deciding what your app should do. If you're vague, it guesses, and guesses add up to a mess.
• Knowing when to stop. It will happily add features you didn't ask for.
• Remembering everything in a long session. Big projects need notes it can re-read (Chapter 4 covers this).
• Judging taste. It makes things that work, not always things that look good (Chapter 6 fixes this).