expo-screen-corner-radius

Get the precise, native corner radius of the device screen on iOS and Android devices with rounded displays.

Installation

``bash


Install the library


npm install expo-screen-corner-radius
`

Usage

`jsx
import { getCornerRadiusSync } from "expo-screen-corner-radius";

export default function App() {
const radius = getCornerRadiusSync(); // Get corner radius in dp

return Device Corner Radius: {radius};
}

// or using the async function

import { getCornerRadius } from "expo-screen-corner-radius";

export default function App() {
const [radius, setRadius] = useState(0);

useEffect(() => {
getCornerRadius().then(setRadius);
}, []);

return Device Corner Radius: {radius};
}

`

Note: Not available in Expo Go. Use a custom development client or build a standalone app to test.

App Store Compliance

This library does not use any private APIs and is compliant with App Store guidelines for both iOS and Android platforms.

API Reference

$3

A synchronous function that returns the device's screen corner radius.

| Platform | Return Value | Notes |
| :--------------------- | :----------------- | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| iOS (iPhone, iPad) | Points (dp/pt) | The value is determined natively in Swift using the hardware model identifier (uname()) and a lookup table. Returns 0 if the device has no rounded corners (e.g., iPhone SE). Returns null if the model is unknown. |
| Android | Points (dp/pt) | Returns the device's corner radius in dp/pt, if available. Only available in Android 12 and later. Returns null otherwise. |
| Web / Other | 0 | Always returns null. |

$3

An asynchronous function that returns a promise resolving to the device's screen corner radius. Same behavior as getCornerRadiusSync()`

Contributing

Contributions are welcome! If you find any inaccuracies in the corner radius values, or anything else, please open a pull request.

Data Source

The corner radius values for iOS are sourced from the community-maintained data in the open-source BezelKit repository.