The core components can be divided into following categories

Basic Components

• View: Most fundamental component for building a UI.
• Text: for displaying text.
• Image: for displaying images.
• TextInput: for inputting text into the app via a keyboard.
• Scrollview: provides a scrolling view that can host multiple components and views.
• StyleSheet: provides an abstraction layer similar to CSS stylesheet.

User Interface

• Button: basic button component for handling touches.
• Switch: renders a boolean input.

List Views

• FlatList: for rendering performant scrollable list.
• SectionList: like FlatList, but divided into sections.

Android

• BackHandler: detect hardware button presses for back navigation.
• DrawerLayoutAndroid: renders DrawerLayout on android.
• PermissionsAndroid: provides access to permission model introduced in Android M.
• ToastAndroid: android toast alert.

iOS

• ActionSheetIOS: to display an iOS action sheet or share sheet

Others

• ActivityIndicator: to display a circular loading indicator.
• Alert: to launch an alert dialog with specified title and message.
• Animated: a library for creating fluid, powerful animations.
• Dimensions: provides an interface for getting device dimensions.
• KeyboardAvoidingView: provides a view that moves out of the way of the virtual keyboard automatically.
• Linking: provides general interface to interact with both incoming and outgoing app links.
• Modal: to display a modal.
• PixelRatio: provides access to device's pixel density.
• RefreshControl: used inside a ScrollView to add pull to refresh functionality.
• StatusBar: to control the app's status bar.