Provides access to the system's UI/app for sending SMS messages.

Allows reading geolocation information from the device. Your app can poll for the current location or subscribe to location update events.

Provides an interface for native user localization information.

Provides an API for FaceID and TouchID (iOS) or the Fingerprint API (Android) to authenticate the user with a face or fingerprint scan.

Provides access to a database that can be queried through a WebSQL-like API (https://www.w3.org/TR/webdatabase/). The database is persisted across restarts of your app.

Provides support for the Google AdMob SDK (https://www.google.com/admob/) for mobile advertising. This module is largely based of the react-native-admob (https://github.com/sbugert/rea ct-native-admob) module, as the documentation and questions surrounding that module may prove helpful. A simple example implementing AdMob SDK can be found at https://github.com/deadcoder0904/expo-goo gle-admob

Provides a React component that renders a gradient view.

Provides an API to get and set screen brightness.

Provides a React component that prevents the screen sleeping when rendered. It also exposes static methods to control the behavior imperatively.

Provides text-to-speech functionality.

Provides access to the system's UI for selecting images and videos from the phone's library or taking a photo with the camera.

Provides access to the system's haptics engine on iOS and vibration effects on Android.

Facebook Audience SDK integration

Provides access to Amplitude (https://amplitude.com/) mobile analytics. This module wraps Amplitude-iOS (https://github.com/amplitude/Amplitude-iOS) and Android (https://github.com/amplitude/Amplitude-Android) SDKs.

Provides an API for interacting with the device's system calendars, events, reminders, and associated records.

Enables native Google authentication features in your app! This module can only be used in ExpoKit, or a Standalone Expo app. For in-depth setup, check out this guide: https://blog.expo.io/react-native-google-sign-in-with-expo-d1707579a7ce

Provides GLView that acts as OpenGL ES render target and gives GL context object implementing WebGL 2.0 specification.

Load fonts at runtime and use them in React Native components.

Provides access to the local file system on the device.

Expo universal module for Facebook SDK

Provides access to the system's web browser and supports handling redirects. On iOS, it uses SFSafariViewController or SFAuthenticationSession, depending on the method you call, and on Android it uses ChromeCustomTabs. As of iOS 11, SFSafariViewController no longer shares cookies with the Safari, so if you are using WebBrowser for authentication you will want to use WebBrowser.openAuthSessionAsync, and if you just want to open a webpage (such as your app privacy policy), then use WebBrowser.openBrowserAsync.

Provides access to the system's UI for selecting documents from the available providers on the user's device.

Expo universal module for crypto

Provides access to the phone's system contacts.

Provides system information that remains constant throughout the lifetime of your app.

A React component that renders a preview for the device's either front or back camera. Camera's parameters like zoom, auto focus, white balance and flash mode are adjustable. With expo-camera, one can also take photos and record videos that are saved to the app's cache. Morever, the component is also capable of detecting faces and bar codes appearing on the preview.

Expo universal module for Audio and Video playback

Lets you use the power of Google Mobile Vision (https://developers.google.com/vision/face-detection-concepts) framework to detect faces on images.

Provides access to a hardware device's accelerometer, gyroscope, magnetometer, and pedometer.

Expo module that provides access to Segment mobile analytics

Allows scanning variety of supported barcodes both as standalone module and as extension for expo-camera. It also allows scanning barcodes from existing images.

Provides a way to encrypt and securely store key–value pairs locally on the device.