1. You can delete apps you install from the App Store. If you delete an app, data associated with the app is also deleted.
   
2. To delete an app, touch and hold the App icon on the home screen, until the icons start to jiggle, then tap X.
   Note: Applications without an X cannot be uninstalled. You can re-download any deleted app that you’ve purchased from the App Store, free of charge.
   
3. A confirmation message will display. Tap Delete.
   
4. When you finish, press the Home button.
   Note: Learn more from Apple support article: Delete music, movies, podcasts, and other content from your iPhone.