This is How You Close and Delete App on an iPhone
There are two primary ways to close and hand on an iPhone. This is dependent on the type of iPhone in the iPhone operating system you have. At this point in time I don’t want to get into the differences, I just want to show you how to close the apps on the phone. Both of these videos are short so watch both of them and you’ll recognize the method that is applicable to your iPhone.
NOTE: The Second Video Shows How to Delete an App