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.
From David Phan:
There are 3 game modes:1. Two players share the same iDevice on the same local network as the Chromecast device.2. Two players each with own iDevice on the same local network as the Chromecast device.3. Two players each with own iDevice and Chromecast device play online across the globe using Game Center. This mode includes voice and text message chats.There are 6 levels to play with.Have fun playing Tic Tac Toe using your giant TV to share with family and friends.Note: This app requires Chromecast to work.