iOS Dimensions.get('window') doesn't exclude SafeAreas

Description

The values returned from the Dimensions API for 'window' are incorrect on iOS.

iOS Dimensions.get('window').height is returning the height with SafeAreas and it should be without SafeAreas

i.e Dimensions.get('window').height should return the screen height without SafeAreas while Dimensions.get('screen').height should return the screen height with SafeAreas as is convention.

This is correct on Android, and incorrect on iOS

Steps to reproduce

Run the following on an Android and an iOS device with SafeAreas. Notice that the Android values differ but the iOS values are the same.

import { Dimensions, Text, SafeAreaView, StyleSheet } from 'react-native';


export default function App() {
  const heighScreen =  Dimensions.get('screen').height
  const heightWindow =  Dimensions.get('window').height
  return (
    <SafeAreaView style={styles.container}>
      <Text style={styles.paragraph}>
       {heighScreen}, {heightWindow}
      </Text>
    </SafeAreaView>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    backgroundColor: '#ecf0f1',
    padding: 8,
  },
  paragraph: {
    margin: 24,
    fontSize: 18,
    fontWeight: 'bold',
    textAlign: 'center',
  },
});

React Native Version

0.79.0

Affected Platforms

Runtime - iOS

Output of npx @react-native-community/cli info

System:
  OS: macOS 15.3.2
  CPU: (10) arm64 Apple M1 Pro
  Memory: 173.42 MB / 32.00 GB
  Shell:
    version: "5.9"
    path: /bin/zsh
Binaries:
  Node:
    version: 23.10.0
    path: ~/.nvm/versions/node/v23.10.0/bin/node
  Yarn:
    version: 1.22.22
    path: ~/.nvm/versions/node/v23.10.0/bin/yarn
  npm:
    version: 10.9.2
    path: ~/.nvm/versions/node/v23.10.0/bin/npm
  Watchman:
    version: 2025.04.14.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.16.2
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 24.2
      - iOS 18.2
      - macOS 15.2
      - tvOS 18.2
      - visionOS 2.2
      - watchOS 11.2
  Android SDK: Not Found
IDEs:
  Android Studio: 2024.3 AI-243.24978.46.2431.13208083
  Xcode:
    version: 16.2/16C5032a
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: 17.0.14
    path: /usr/bin/javac
  Ruby:
    version: 2.6.10
    path: /usr/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 19.0.0
    wanted: 19.0.0
  react-native:
    installed: 0.78.2
    wanted: 0.78.2
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: true
iOS:
  hermesEnabled: true
  newArchEnabled: true

Stacktrace or Logs

No Stacktrace, as no crash just incorrect values returned from API

MANDATORY Reproducer

https://snack.expo.dev/ci1UBlgM8PsixJnwYqW1d

Screenshots and Videos

No response

Dimensions API の iOS 実装から始め、ウィンドウと画面の計算を Android と比較します。Safe Areas のあるデバイスで必須の Snack 再現手順を実行し、window.height が Safe Areas を除外する一方で、screen.height が現在の動作を維持することを確認します。