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 Yishan Gao:
Wanna toss a coin for a hard decision? This app lets you toss a coin in your iPhone/iPad. It is based on accurate physics engine, the feeling is the same like tossing a coin in real world. Moreover, you can shake your iPhone/iPad to toss, if you turn the 'Accelerometer' option in app on.I bet it is definitely the best coin-toss app you ever see. And it is free!