ru is a free Android game under the Strategy subcategory developed by General Adaptive Apps Pty Ltd. It is the 19th game in the "focus" series, which includes aa, uu, ff, and more. The objective of the game is to rub the screen up and down as fast as you can.

The game is a silly and fun pastime that can be quite addictive. It challenges players to top the leaderboard by rubbing their screens as fast as possible. The game has a simple interface and can be played anywhere on the screen. Even though the game is simple, it can be challenging to master. Whether you are waiting for a bus or taking a break, ru is an entertaining way to pass the time. Handmade in Australia, the game is a product of General Adaptive, a reputable developer in the gaming industry.