Ru is a game developed by General Adaptive Apps Pty Ltd for iPhone. It is a free game that falls under the category of Games. In Ru, players are challenged to rub their finger up and down the screen as fast as they can. It is a silly and fun pastime that can quickly become addicting.

The objective of Ru is to see how fast you can rub up and down the screen. There is a leaderboard where players can compare their scores with others from around the world. The game provides a simple and straightforward gameplay experience that can be enjoyed by people of all ages.

Ru is part of the "focus" series of games developed by General Adaptive Apps Pty Ltd. It is a handcrafted game made in Australia. If you're looking for a casual game to pass the time and test your finger speed, Ru is worth a try.