Mobile apps that make you go gaga! StickyHead is a fun celebrity guessing game that we?ve now brought to mobile devices. Participants get to be silly with their friends (i.e., slapping virtual sticky notes on each other?s faces!) and compete in this trivia on the go. Guesswher is a mobile location-based photo guessing game. Post your cool photos and let others guess where they were taken; test your own knowledge of places and spaces by guessing the location of others? photos.