The complementary subscription provides three years of Cozi Gold membership. Cozi Gold is the premium version of Cozi, the leading family organizing app with a
shared calendar and lists. With Cozi Gold, you get an ad-free experience for everyone in the family and every device, plus premium features not in the free version of Cozi.

Coordinate the family across all your devices - iPhone/iPad, Android, Windows, Desktop

http://www.cozi.com/