This is the preview app for the Macaw UI Kit that you can buy from here: https://www.epicpxls.com/items/macaw-ui-react-native-theme There is also a live demo and presentation page here: https://macaw.epicpxls.com/ You get Sketch files and Photoshop files with the app when buying.
Macaw UI Preview is an Expo project. Get started with your own project.