Closing out an App from using

You can swipe up from the bottom of your screen and let go around halfway once they are shrunk, then swipe up on it. When complete, tap any blank space. But note a popular misconception is to swipe out of your apps when done to "save battery or resources". This isn't necessarily true and iOS puts non-open apps in a suspended state until it is reopened. If you close out of it, it has to reload and relaunch it, which will drain more battery.

Read this excellent explanation: Do not close iPhone and iPad 'background'… - Apple Community

Zachyy wrote:

You can swipe up from the bottom of your screen and let go around halfway once they are shrunk, then swipe up on it. When complete, tap any blank space. But note a popular misconception is to swipe out of your apps when done to "save battery or resources". This isn't necessarily true and iOS puts non-open apps in a suspended state until it is reopened. If you close out of it, it has to reload and relaunch it, which will drain more battery.

Read this excellent explanation: Do not close iPhone and iPad 'background'… - Apple Community

And this is an excellent explanation!

Swipe up from the bottom of the screen.

click here ➜ Exit from an App and return to the Home Screen - iOS User Guide

Thanks Idris!!