# How to Use Supabase With React Native and Expo

> Supabase can give an Expo app authentication, database, storage and server-side functionality quickly, but mobile clients must still be designed as public, untrusted environments.

Publisher: FaturaTik
Last reviewed: 2026-09-05
Canonical HTML: https://www.faturatik.net/en/blog/supabase-react-native-expo

Supabase is a practical backend option for mobile products that need authentication, a Postgres database, file storage or server-side functions without building every infrastructure layer from scratch.

## Decide what the backend owns

Before integrating anything, define which data must survive across devices and which operations need a trusted server environment.

Typical backend responsibilities include:

- user accounts,
- profile and product data,
- uploaded files,
- shared records,
- subscription state synced from a trusted source,
- scheduled processing,
- private third-party API credentials.

## Mobile apps are public clients

Anything bundled inside an iOS or Android application can ultimately be inspected. Do not place Supabase service-role credentials or other private keys in the app.

Client applications should use the public client configuration intended for them, while authorization is enforced through database policies and trusted server-side code.

## Authentication flow

A basic app might initialize the Supabase client in one module, expose session state through an auth provider and redirect users based on whether a valid session exists.

The specific code changes over time, so follow Supabase's current React Native quickstart for package and storage configuration.

## Row Level Security matters

A common mistake is assuming that hiding a database query in the app protects it. It does not.

Use Row Level Security policies so the database itself defines what each authenticated user can read or modify. Test policies with multiple accounts rather than only the developer account.

## Keep domain types clear

Generate or maintain TypeScript types for important records. Clear data contracts are useful for developers and for AI editors changing multiple screens.

Do not let every component invent its own interpretation of the same database row.

## Use server-side functions for secrets and trusted operations

Examples include:

- calling a private external API,
- signing webhooks,
- validating sensitive business rules,
- transforming uploaded financial reports,
- creating deterministic invoice or accounting records.

The client can request the operation, but the trusted logic should execute outside the mobile bundle.

## Plan for failure

Authentication expires. Networks disappear. Uploads fail. A robust mobile experience needs explicit loading, retry and offline behavior where relevant.

## Why this matters after monetization

Once an app starts earning money, backend state often becomes tied to entitlements, platform events and reporting. Keep product access logic and financial reporting data explainable enough to reconcile later.

Supabase can accelerate the backend, but speed should not come at the cost of unclear permissions or secrets in the client.


## Disclaimer

This article provides general information. Product features, store rules, fees and third-party requirements can change; verify important details in the official documentation before production use.

## Frequently asked questions

### Can I use Supabase with Expo?

Yes. Supabase provides React Native guidance and can be used from Expo applications.

### Can I put the Supabase service-role key in my mobile app?

No. Service-role credentials are highly privileged and should remain in a trusted server environment.

### Do I still need Row Level Security if users log in?

Yes. Authentication identifies a user; authorization policies determine which database rows that user is allowed to access.

## Sources

- [Supabase — React Native quickstart](https://supabase.com/docs/guides/auth/quickstarts/react-native)

## Related guides

- [expo-mobile-app-tutorial](https://www.faturatik.net/en/blog/expo-mobile-app-tutorial/index.md)
- [nativewind-expo-setup](https://www.faturatik.net/en/blog/nativewind-expo-setup/index.md)
- [expo-app-store-publishing](https://www.faturatik.net/en/blog/expo-app-store-publishing/index.md)