Force Quitting App / App Switching
This is a tutorial on how to force quit an application. Think of this as the “Control + ALT + Delete” for your iPhone or iPad.
Many applications will stay in the device memory even after you switch out of them, running in the ‘background’. This will cause some applications to crash or become unstable due to lower memory availability.
See Apple Tutorial: https://support.apple.com/en-us/HT201330