Kas Kas Ko is an Android game designed to test your knowledge in various subjects such as language, ethnography, history, geography, literature, and sports. The game was created by DekSoft and is completely free to download and play.

The game is based on a popular Latvian trivia game from the 1980s called "Kas, Kas, Ko?" which was created by a group of Latvian teachers. The game features more than a thousand questions across six categories, providing hours of fun and educational gameplay. The questions are challenging and cover a wide range of topics, making it suitable for players of all ages.

Overall, Kas Kas Ko is a great game to test your knowledge and learn new things at the same time. It's a fun and educational way to spend your free time, and with its easy-to-use interface and free price tag, it's definitely worth checking out.