App Selector is a feature that is available on select Android devices, particularly on T-Mobile and Metro devices operating on Android 8.1 and above. It is a pre-installed app that appears when you first set up your phone on T-Mobile devices, and it gives you more control over the apps that can be installed on your device during the initial setup process. App Selector gives you the ability to easily select and install various applications when you first begin setting up your new device. It can help you find the best apps for your device, and it provides a list of app recommendations based on a few options that it prompts you to choose from when you first open the app. Once youve completed the setup process, App Selector can be found in your devices app settings, and the applications downloaded through App Selector are visible in your tray just like any other application downloads. All applications downloaded using App Selector are managed and updated through the Google Play Store after the initial setup is complete, just like any other app.