Zoo World gains lots of installs, not many players
But Zoo World's impressive topline growth hides a potential weakness in its daily user statistics. Only 13% of the game's monthly users visit the game daily, well below the 20 to 25 percent average for many successful games. One potential reason for the discrepancy: RockYou has been including a copy of Zoo World for free with its popular Birthday Cards application. While this seems to be a good way to get new users and pad the statistics for Zoo World, it doesn't seem to be translating into as many regular Zoo World players as RockYou might want.