How can I force close the app?

To force close an app on an Android device, you can follow these general steps:

1. Open the "Recent Apps" or "App Switcher" screen. This can usually be done by tapping the square or rectangle-shaped button at the bottom of the screen or by swiping up from the bottom and holding briefly.
2. In the Recent Apps screen, you will see a list of the recently used apps.
3. Swipe left or right, or scroll up and down, to find the app you want to force close.
4. Once you locate the app, swipe it sideways or swipe it up off the screen to force close it. Alternatively, some devices may have a close button, "X" or "Close" icon, or a swipe-down gesture to close the app.

Please note that the exact steps may vary slightly depending on the Android device you are using, as different manufacturers may have slightly different interfaces.