Agentic Coding for React Native and Expo Apps

React Native and Expo let web-experienced teams build iOS and Android apps with TypeScript and React. Coding agents have seen a huge amount of this kind of code, so they tend to be fluent in it. That fluency can hide the tricky part: a mobile app is not a web page, and the gap between them is where agents most often stumble. This guide explains how to get speed without surprises. Always verify framework details against current Expo and React Native documentation.

What agents do well here

• Screens and navigation flows described in plain language.
• Form handling with validation and error messages.
• API clients and typed data models.
• Unit and component tests with the project's existing test tooling.
• Refactoring repeated UI into shared components.

Specific risks in React Native projects

Dependency and version drift

Mobile libraries are tightly coupled to the framework version. An agent might add a package that does not match your Expo or React Native version, or suggest an API from an older release. Check compatibility before accepting any dependency change, and prefer packages the project already uses.

Native modules

Anything touching camera, location, push notifications or background tasks needs native configuration. Missing permission descriptions or entitlements can crash an app or cause a store rejection. Review the configuration files, not just the JavaScript.

Web habits on mobile

Agents sometimes use browser concepts that do not exist in React Native, or ignore safe areas, keyboard handling, small screens and the back gesture on Android. Humans catch these within minutes on a device.

Performance

Long lists, large images and heavy re-rendering behave very differently on a mid-range phone. Test where your users are, not on the newest flagship.

A workflow that holds up

1. Write the task with the expected behavior on both platforms.
2. Ask the agent to propose a plan and list files it will change.
3. Let it implement in small steps, running the type checker and tests after each.
4. Review the diff, giving special attention to configuration and dependencies.
5. Run the app on at least one real iPhone and one real Android phone.
6. Merge only when the checks pass and the reviewer is satisfied.

Builds and releases

Cloud build services and Expo tooling simplify producing store-ready binaries, but you still handle signing credentials, store listings, privacy declarations and review responses. Remember Apple's App Store Review Guideline 4.2 on minimum functionality and Google's testing requirements for new personal developer accounts, and verify current rules before release. For a pipeline view, see CI/CD for AI-built apps.

Choosing between approaches

If you already have a web product and want an app quickly, a wrapper approach may be enough; if you need deeper native feel, React Native is a strong middle path. Our guide to Capacitor vs. React Native compares them in detail.

Instructions to give your agent

A short instruction file pays off quickly. Name the Expo or React Native version, the navigation library, the styling approach and the test commands. List folders the agent must not edit, such as generated native directories if you use managed workflows. State that new dependencies need approval and that every change must pass the type checker and linter. Add one or two example files that show the conventions you want followed.

Finally, remind the agent that this is a mobile app: handle offline states, loading states and permission denial on every feature that touches the network or the device. Agents rarely volunteer these cases, but they appear in nearly every store review and support ticket.

How apprat.io works with React Native

We use coding agents such as Claude Code, OpenAI Codex and Cursor to implement React Native and Expo features quickly. Senior AI Code Engineers plan the work, review every change, test on real devices and take care of store submission, and they stay accountable for the result. Our ISO 9001 and ISO 27001 certified processes apply to every project. For an expert review of an existing codebase, book a call for free.