Expo Router
File-system based routing for universal React Native and web apps. Like Next.js but for Expo — create app/index.tsx and it becomes the root route. Nested layouts, dynamic routes ([id].tsx), and route groups work like Next.js file conventions. Built on React Navigation under the hood but provides a Next.js-familiar developer experience. Enables universal apps that share routes between iOS, Android, and web.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
Navigation framework — no direct security surface. Expo maintains. Deep link validation important to prevent route injection.
⚡ Reliability
Best When
You're starting a new Expo project and want Next.js-familiar routing conventions with automatic deep linking and universal web/mobile support.
Avoid When
You have complex custom navigation requirements or an existing React Navigation setup — Expo Router adds constraints for complex nav flows.
Use Cases
- • Build agent mobile apps using Next.js-like file routing conventions — familiar for web developers moving to React Native agent apps
- • Create universal agent apps that share route logic and layouts between iOS, Android, and web from a single Expo Router codebase
- • Implement deep linking automatically — Expo Router generates universal links and URL schemes from file structure without manual configuration
- • Use Expo Router's API routes (server-side) for agent backend endpoints that co-locate with mobile app screens
- • Build agent admin panels as universal apps — same screens work as mobile app and web dashboard with Expo Router's web support
Not For
- • Complex custom navigation flows that need React Navigation's full programmatic control — file-based routing has constraints for unusual navigation patterns
- • Existing React Navigation codebases — migrating to Expo Router requires significant restructuring of navigation architecture
- • Non-Expo React Native projects — Expo Router is tightly coupled to Expo build toolchain; use React Navigation directly for bare RN
Interface
Authentication
Navigation framework — no authentication. Auth handled by application code; use middleware or redirect in root layout.
Pricing
Expo open source project. MIT license.
Agent Metadata
Known Gotchas
- ⚠ Expo Router requires Expo SDK — it doesn't work with bare React Native without Expo; verify your project setup before starting
- ⚠ API routes (server-side) only work with Expo's hosting or custom server config — API routes don't run on mobile; they're web-only server endpoints
- ⚠ Dynamic routes use [param].tsx naming — Expo Router's dynamic params must be wrapped in brackets; copying Next.js conventions works but web-only features (catch-all [[...slug]]) have mobile limitations
- ⚠ Typed routes feature requires running npx expo customize to generate route types — without this, useRouter().push() accepts arbitrary strings without type checking
- ⚠ Layout files (_layout.tsx) wrap all sibling routes — a common mistake is putting shared UI in a regular file instead of _layout.tsx, causing it not to persist across navigation
- ⚠ Expo Router v3 → v4 changed how middleware and redirects work — migration guide required; upgrading without reading it causes auth redirect loops
Alternatives
Full Evaluation Report
Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Expo Router.
Scores are editorial opinions as of 2026-03-06.