If you want to perform a more complicated way, please refer to the article how to install and delete iPhone apps. And the method that I am about to show below applies to all iPhone models: iPhone 6, 7, 8, X, even iPhone 11.
Method 1: Uninstall an application on iPhone
This is how you will uninstall each application.
Method 1 : Press and hold on the application icon then select 'Delete application'
Step 2 : Click 'Delete' to confirm the application uninstall.
Method 2: Press and hold longer to delete multiple applications
Click on the icon and hold longer than usual, then the screen will appear more X marks on the application. If you want to delete an application, click on its X mark.
Step 1 : Click the 'x' on the application you want to delete.
Step 2: Click 'Delete' to confirm the application removal and press
Above is a simple trick to delete / remove iPhone application. This method can be applied to all models, even users like Samsung and Oppo have the same method.