Remember the "Which one of these things doesn't belong here?" Games of old? Where is..? for Android is a new twist on those old games. It is sort of a cross between those and a matching game with a sprinkle of find the hidden picture mixed in for good measure. Basically, you have to find the exact match to a picture, maybe a hat or a monkey, it could be anything. There may be others that are similar, but you have to find the exact match.
If you do well, you could find yourself the king of the Where is..? Swarm leaderboards. Scores can be posted and compared with players around the world for a competitive experience that adds a little something, but if you aren't into that it's okay. Just play for the fun of it and try to beat your own high score.
There is more to it than fun though. While you are having all this fun, you are developing and fine tuning attention to detail. This is a skill that is necessary is many aspects of life. What better way to pass the time and have fun than by bettering yourself in the process? All it takes is a one download to your mobile device and you can have it all, anytime, anywhere.