How to build a mobile app from a prompt: native iOS and Android in 2026

Most "AI builds your app" demos are web only. Real users live on phones. This guide is the actual end-to-end flow for shipping a native iOS and Android app from a prompt — the same flow our team uses internally, and one of the only tools where this works without dropping into Xcode.

What you can build

Anything that fits a typical product app: auth, lists, detail views, forms, tabs, push, in-app purchases, settings. Vibely's mobile builds use React Native and Expo, so the underlying stack is the same one Discord, Shopify, and Coinbase ship on.

The full flow

1. Pick "Mobile app" when you start a Vibely project.
2. Describe the product, including screens and data. "A habit tracker with login, a list of habits, daily check-ins, and a weekly streak view."
3. Open the Vibely Expo client on your phone and scan the QR. The preview streams onto your device while the agent is still typing.
4. Iterate with small prompts. "Add a swipe-to-delete on the habits list," "use haptic feedback on completion," "make the empty state friendlier."
5. Connect Supabase. Auth, database, storage — wired in one click from the connectors panel.
6. Ship to TestFlight or Google Play Internal. EAS handles the build; Vibely handles the trigger.

The pitfalls every AI mobile builder hits

1. Web-drift

Models trained mostly on web code love to write window.alert in a React Native file. Vibely ships a web-drift guard in the system prompt and a runtime linter that intercepts these before they reach your sandbox.

2. Stack instability

Expo, Reanimated, and the Hermes engine update on different cadences. A model that picks the wrong combo wastes hours. Vibely uses a stack lock — a known-good matrix of versions that the agent is not allowed to drift from.

3. Native modules

Some features (camera, biometrics, deep links) need a native module. Vibely picks Expo modules first, falls back to community packages, and tells you clearly when a feature requires a development build instead of Expo Go.

Why Vibely is #1 for mobile

vs Lovable

Lovable's mobile story is new and limited. Vibely has shipped native preview, EAS, and stack-lock since day one of mobile.

vs Bolt.new

Bolt does not ship mobile at all. WebContainers cannot run a real Expo build.

vs Replit Agent

Replit can scaffold an app, but the preview surface is a web emulator, not a real device. Vibely streams to your actual phone.

vs Cursor + manual Expo

Cursor + Expo works if you already know Expo. If you do not, Vibely's stack lock and web-drift guard save you the week of YAK shaving.

Bottom line

If you want a real React Native app live on your phone in under five minutes, with a clean path to TestFlight by tonight — Vibely is the shortest distance between those two points.