Concentration is a free card game developed by rainian for Android users. This game is designed to test your memory by remembering a set of cards. As you progress, the time to remember the cards decreases, making the game more challenging. The objective of the game is to reach the highest score and compete with your friends.

The game has a great modern design with cool card covers and nice sounds. It has smooth gameplay and is easy to use. The online highscore feature allows you to compete with other players worldwide. Additionally, the game has achievements to unlock, adding a layer of excitement to the gameplay.

Concentration is available in English, German, French, Italian, Spanish, and Portuguese (Brazil). The developer is planning to add more features like Facebook integration, Tell a friend, and choosing different styles of cards in future updates. You can follow rainian on Facebook, Twitter, Google+, and YouTube to stay updated with the latest news.