What is an app, exactly?
After this, you will know what an app is and what it does.
An app is a small program on your phone or computer. Each one does a job. The weather app shows weather, and ChatGPT answers questions.
You open an app by tapping its little picture. That picture is called an icon. One tap and the app opens up.
Apps live on your screen, ready when you want them. You can have many. You only use the one you tap.
Buddy says
If you tap the wrong app, just close it and tap the one you wanted. Nothing is harmed.