Unable to make requests to local API from iOS

[domnantas]

Current Behavior

Making requests to local API on iOS causes TypeError: Network request failed error in some cases:

• Web – works as expected
  • Relative URL (/api/hello) ✅
  • localhost URL (http://localhost:8081/api/hello) ✅
  • Local IP URL (http://192.168.0.[x]:8081/api/hello) ✅
• iOS simulator
  • Relative URL (/api/hello) ❌ – Network request failed
  • localhost URL (http://localhost:8081/api/hello) ✅
  • Local IP URL (http://192.168.0.[x]:8081/api/hello) ✅
• Real iOS device
  • Relative URL (/api/hello) ❌ – Network request failed
  • localhost URL (http://localhost:8081/api/hello) ❌ – Network request failed
  • Local IP URL (http://192.168.0.[x]:8081/api/hello) ✅

This makes testing on mobile difficult, especially with createBetterAuthClient({ baseURL }) where baseURL needs to be set to local IP for convenient development.

Expected Behavior

Fetching should work consistently across devices, or this issue should be mentioned in the documentation.

I understand this is not one-specific issue, but perhaps we could tweak Expo/React Native settings on the example templates to make the development experience smoother.

One Version

1.1.432

Platform (Web, iOS, Android)

iOS, might be reproducible on Android too.

Reproduction

https://github.com/domnantas/one/tree/ios-api-issue

System Info

System:
    OS: macOS 15.0.1
    CPU: (8) arm64 Apple M1
    Memory: 73.61 MB / 16.00 GB
    Shell: 3.6.1 - /usr/local/bin/fish
  Binaries:
    Node: 20.12.2 - ~/.volta/tools/image/node/20.12.2/bin/node
    Yarn: 4.5.3 - ~/.volta/tools/image/yarn/4.6.0/bin/yarn
    npm: 10.5.0 - ~/.volta/tools/image/node/20.12.2/bin/npm
    bun: 1.1.7 - /opt/homebrew/bin/bun
  Browsers:
    Safari: 18.0.1
  npmPackages:
    @react-native-community/cli: 15.1.3 => 15.1.3 
    @types/react: ^18.3.11 => 18.3.18 
    expo: ~52.0.17 => 52.0.30 
    one: 1.1.432 => 1.1.432 
    react: ^19.0.0 => 19.0.0 
    react-native: ^0.76.5 => 0.76.6 
    react-native-reanimated: ~3.16.5 => 3.16.7 
    react-native-safe-area-context: 4.10.5 => 4.10.5 
    react-native-screens: 4.4.0 => 4.4.0 
    react-native-web: ^0.19.12 => 0.19.13 
    vite: ^6.0.6 => 6.0.11