Hello World: Toast may very well be the simplest "Hello World" Android app.
"Hello World" programs are pretty famous, even if all they do is write "Hello World!" on the screen. When learning a new programming language or platform, starting with a simple "Hello World" program has become a tradition. They can also be used to test things out, and verify that a language or system is operating correctly.
Hello World: Toast is a standard Android app, that can be installed on any Android device, and started from the Apps or Home Screen. It just displays the famous "Hello World" text in a toast (the familiar Android small popup that is usually used to show a quick little message to the user). Then the app closes (even before starting). That's it.
(However, Hello World: Toast can be useful if you need to explain or show someone how a real Android toast looks like.)
Hello World: Toast runs on any Android smartphone, tablet, or device. It runs on the latest Android versions, and even on the oldest versions, starting with Android 1.0! (Check out the screenshots: the one with the big analog clock is Hello World: Toast running on the first version of Android!)
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