import { getStatusBarHeight } from 'react-native-status-bar-height';

// 44 - on iPhone X
// 20 - on iOS device
// X - on Android platfrom (runtime value)
// 0 - on all other platforms (default)
console.log(getStatusBarHeight());

// Will be 0 on Android, because you pass true to skipAndroid
console.log(getStatusBarHeight(true));