X Fade Quiz is a free Android game developed by Wasabi Applications わさびアプリケーションズ株式会社. It falls under the board game category and offers a unique twist to the classic spot-the-difference game.

The game consists of 60 levels where players must identify the difference between two photos. As the levels progress, the difficulty increases, but players can adjust the changing speed in the settings. The game also provides hints after several challenges, which become easier with more attempts. If a player still can't find the difference, they can skip the level.

Overall, X Fade Quiz is a fun and challenging game that offers a new take on the spot-the-difference concept. It's a great way to pass the time and test your observation skills.