A step-by-step guide to connecting a Rork-generated React Native app to a real backend and adding user authentication, with the iOS-specific details you can't skip.
Rork is good at generating screens and flows, but a real app usually needs data that persists and users who log in. That means a backend.
Rork produces a React Native + Expo client. The backend — your API, database, and auth — is a separate system the app talks to over the network.
This separation is normal and healthy. It means you can choose any backend that speaks HTTP and isn't locked to a single vendor.
The goal of this guide is to connect your Rork app to that backend cleanly and add login in a way that holds up on iOS specifically.
Before writing prompts or code, list your data and actions. What does the app store, and what can a user do?
For a notes app, that might be: create, read, update, and delete notes, each tied to a user. Defining this shapes both your API and your prompts to Rork.
Decide whether you'll use a managed backend or roll your own. Managed services handle auth, database, and APIs for you, which pairs well with the speed Rork gives you on the front end.
Write down the data shapes explicitly. Clear models make the generated client code match your API far more reliably.
Provision your backend first so you have real endpoints to point the app at. A managed platform that provides a database, auth, and auto-generated APIs is the fastest route.
Create your data tables or collections to match the models from Step 1. Keep them simple at first; you can extend them as the app grows.
Secure them from the start. Configure access rules so a user can only read and write their own data, not everyone's.
Test the endpoints independently with an API client before involving the app. If the backend misbehaves on its own, debugging it through the app is far harder.
Now wire the client to the backend. Prompt Rork to fetch and display data from your API, giving it the endpoint shape and the data model.
Store your API base URL and keys in environment configuration, not hard-coded in screens. This keeps secrets out of the UI code and makes switching between dev and production clean.
Verify reads first. Get a list screen pulling real records before you attempt writes, so you isolate problems.
Review the generated networking code. Error handling and loading states are exactly the kind of detail AI output often under-specifies, and they matter on a phone with flaky connectivity.
With data flowing, add login. Most managed backends provide email/password and social sign-in you can call from the client.
Prompt Rork to build the sign-up and sign-in screens, then connect them to your backend's auth. Keep the token handling in one place so the rest of the app can rely on it.
Persist the session securely. On iOS, sensitive tokens belong in secure storage, not plain local storage, and Expo offers a secure-store option for exactly this.
Gate your screens by auth state. Logged-out users should see the login flow; logged-in users should land in the app. Test both paths on a real device.
This is the iOS-specific catch. Apple's guidelines generally require offering Sign in with Apple when your app offers other third-party or social login options.
If you add Google or Facebook login, plan to add Sign in with Apple too, or you risk App Store rejection. This is a policy requirement, not just a feature choice.
Expo supports Apple authentication, so it's achievable in a React Native project. Configure it against your Apple Developer account and test it on a physical device, since it doesn't fully work in simulators.
Getting this right early saves a painful rejection-and-resubmit cycle later.
Run the whole journey on a real iPhone: sign up, log in, create data, see it persist, log out, log back in, and confirm the data is still there.
Test failure modes deliberately. Wrong password, no network, and expired sessions all need graceful handling, and they're easy to forget in a happy-path demo.
Check that data is properly scoped per user. Logging in as a second account should never show the first account's data — verify this explicitly.
Preview through Expo Go for fast iteration, but remember some auth features behave differently in a full build, so do a final pass on a real build before release.
Before shipping, audit secrets. No API keys or tokens should be committed to source control or exposed in client code that ships to users.
Re-check your backend access rules. The most common real-world data leak is an over-permissive rule that lets any user read everyone's records.
Review the AI-generated auth code with extra care. Authentication is security-critical, and it's the last place to blindly trust generated output.
When the flow is solid and scoped, you're ready to move into the EAS build and App Store submission pipeline with a backend-backed, login-enabled app.
The biggest architectural decision is whether to use a managed backend or build your own API. Both work with a Rork client; they trade off differently.
A managed platform gives you a database, authentication, and ready-made APIs quickly, which complements the speed Rork gives you on the front end. For most early apps, that pairing gets you to a working product fastest.
A custom backend gives you full control over business logic and data handling, but you own more of the security, scaling, and maintenance work yourself.
A reasonable default is to start managed and validate the product, then move specific pieces to custom services only when a real need appears. Either way, keep the client talking to the backend over plain HTTP APIs so you can swap implementations without rewriting the app.
Authentication is more than a login screen — it's the lifecycle around the session. Getting that lifecycle right is what separates a demo from a trustworthy app.
Store tokens in secure storage, refresh them when the backend supports it, and make sure logout actually clears the credential rather than just navigating away from the home screen.
Decide what happens when a token expires mid-use. A graceful path sends the user back to login with a clear message instead of showing a cryptic error or a blank screen.
Test these transitions on a real device: cold start while logged in, expiry during use, and an explicit logout. These are exactly the paths a happy-path demo skips and exactly the ones reviewers and real users will hit.
Rork focuses on generating the React Native + Expo client. You connect it to a separate backend — either a managed platform or your own API — for data and authentication.
If your app offers other third-party or social logins, Apple's guidelines generally require offering Sign in with Apple as well. Plan for it to avoid App Store rejection.
Use secure storage rather than plain local storage. Expo provides a secure store suitable for sensitive tokens on iOS.
Configure backend access rules so each user can only read and write their own records, and test explicitly by logging in as a second account.
Expo Go is good for fast iteration, but some auth features, including Sign in with Apple, behave differently or require a real build and a physical device, so do a final pass on a full build.