Pen - prank is an entertaining Android application that simulates the opening and closing of automatic pens. With this app, you can play a prank on your friends by pretending to open or close a fountain pen. It is important to note that this app is purely for entertainment purposes and does not cause any harm.

The main feature of Pen - prank is its realistic simulation of the opening and closing action of a fountain pen. The app provides a fun way to trick your friends into thinking that you are using a real pen. However, it is important to note that this application does not have the functionality of real fountain pens.

If you are looking for a lighthearted and harmless prank to play on your friends, Pen - prank is a great choice. Download it for free from the Google Play Store and have fun fooling your friends with this realistic pen simulation app.