The Facebook-owned mobile photo sharing app Instagram is the No. 1 most popular app in terms of monthly active users logging in with Facebook.
One year ago, Instagram had only 3 million Facebook-connected MAU. Now it has more than 44.8 million MAU, first taking the No. 1 spot on Dec. 29, as it surged and FarmVille 2 and TripAdvisor™ declined.
Off-Facebook integrations, including web, mobile and desktop apps, have gained significantly over the past year. Eleven of the top 25 apps exist completely outside of the Facebook chrome, and five of Zynga’s games on the list have versions that are playable on Zynga.com