Facebook's Timeline spells success for apps

Dozens of apps joining the social network's Timeline are becoming overnight success stories. Take Viddy -- two months after launching its Timeline app, it's now No. 1 in the iTunes store.

A couple of months ago, most people had no idea what Viddy was. Since getting its start in April 2011, this app -- which is like Instagram but for video -- tallied 60,000 monthly active users. Then, in February, Viddy launched its Facebook Timelineapp and it's been smooth sailing ever since.

Now Viddy has more than 1.7 million monthly active users and averages about 300,000 new registered users per day. Since its Timeline launch, there have been more than 15 million interactions with Viddy content on Facebook. Also, for the first time ever, it's the No. 1 app in the iTunes store.

Viddy isn't Timeline's only success story; many apps credit Facebook for thousands of new users, including Pinterest, iHeartRadio, Foodspotting, Flixster, and Diamond Dash. In fact, seven out of the top 10 grossing iOS apps are integrated with Facebook.

Other apps that have seen rampant growth since launching Timeline apps are VEVO, Pose, and BranchOut, all of which had significant daily increases in traffic, signups, and visitors from Facebook.