The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
Test your reaction speed or how awake you are with reaction drop! The goal of the game is simple -- tap the green buttons before the blue squares reach them. Two blue squares fall each round, and each round gets faster and faster. It's a great way to see your reaction time and whether or not you need sleep. Your average reaction time should be less than 0.4 seconds.