1: Double-press on the Home Button to bring up the app Task Manager on iPad
First just double-press on the Home button on the iPad, the Home button is the round button on the front of the device underneath the screen.
When you double-press on the Home button twice quickly, you will see the app task manager where you can multitask and quit apps easily.
2: Swipe-Up to close and exit FoodSafe.io on iPad
Swiping up on one of the FoodSafe.io mobile app thumbnail shown in the multitasking screen will quit the app. Just swipe it up so that it goes off the screen, it will close the app and exit it completely on iPad.