It is an Android app that consists of a quiz, with questions related to the flags of different countries.
The app consists of 3 screens. On the first screen, the user informs his name, before starting the quiz. The second screen displays the questions, which will change as the user answers one question and moves on to the next.
If you want to see this app running, click on the image below to take a look at a demo illustrated in a YouTube video:
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