How do I close the app without turning off the phone?

[tsloper_admin]

There are more ways than one to close an app on iPhone, depending on whether you have a newer device without a Home button, or an older device with a Home button. And whether you want to switch to a different app, or just want to go to the Home screen. It isn't actually necessary to close the app. 

To go to the Home screen:

If you have a Home button, pressing it minimizes the app, returning you to where you were when you tapped the app icon (either the Home Screen or a folder the app is in). If you don't have a Home button:
Swipe up quickly from the very bottom* edge of the screen. (If you are holding the phone in landscape mode, the "bottom" is probably the long side.) This fast, upward gesture acts as the home button.

To access the App Switcher:

Newer devices, without a home button:
Swipe up from the bottom* edge of the screen and pause in the middle before lifting your finger to bring up the iOS App Switcher, then swipe NMJL Online up off the screen to close it.

There are even more ways to switch between apps, such as swiping sideways along the bottom* edge bar.
*If swiping in portrait mode isn't working, try landscape mode.

Older devices, with a home button:
From in the app, double-tap the Home button. This brings up the App Switcher. Find NMJL Online (or whatever app you want to close) and swipe it up off screen. Or just tap on another app that you want to use. 

Above: NMJL Online in the App Switcher (landscape orientation)

Above: If a bar or handle appears at the bottom of the screen after a swipe up,

quickly grab it, and swipe the handle up to dismiss NMJL Online.