Mobile application stores such as Apple’s App Store and Google’s Android Market enable researchers to use App Stores as a platform for user studies. Because successful studies can require a large number of users researchers might need to attract a large audience. The right timing when releasing or updating apps can considerably increase the number of installations. Using a game that is published in the Android Market we ana-lyze when people install games. Furthermore, we de-termine when developers deploy games in the Android Market. We combine data from 157,438 installations of the game and the observation of 24,647 published apps. Our results suggest that the best time to deploy a game in the Android Market is on Sunday evening GMT.