Anyone who just got an iPhone or iPad is undoubtedly wondering how to close applications completely? By closing apps, they will no longer be active in the background and will be fully restarted when opened.
If you exit an app by pressing the Home button or swiping up from the bottom of the screen, the application will be hidden. Sometimes it is necessary to close an app completely, for example if there are problems.
Standby or completely shut down
When you leave an app, it is put into sleep mode (standby) and remains active in the background for a limited time. The next time you open the application again, it will resume so you can pick up where you left off. The application is therefore not fully started. If you close an app completely, the app will be restarted.
Close applications completely via the app switcher
Before you close apps, you should know that iOS and iPadOS have an app switcher. This stores all applications that have been put into sleep mode.
You can open the app switcher by pressing the home button twice. If you have an iPhone or iPad without a home button, you can open the app switcher by swiping up from the bottom of the screen and stopping halfway down the screen, then release (more info).

Once you open the app switcher, you can swipe from right to left to view all running applications. You can close the app completely via this view. You do this by swiping up with one finger on the app you want to close. If you want to close multiple apps at once, you can use two or more fingers.
The apps will be closed immediately and will have to be restarted when you reopen the app. In most cases, data is retained.
To close or not to close
Should you or shouldn’t you close apps completely? It is a question that has already caused a stir. However, Apple indicates that it is better not to close iPad and iPhone apps completely. This is because many apps continue to run in the background for efficient battery usage, faster access, updates and notifications, and to optimize overall system performance. Constantly closing apps can actually increase battery consumption and lead to longer loading times when reopening apps.

The system is designed to handle system resources efficiently, including managing apps in the background. The operating system can decide which apps should remain running in the background and which can be temporarily paused, optimizing the overall performance of the system. Manually closing apps can disrupt this process and cost unnecessary system performance.