Birthday Reminder, SimCity promotion, Songza, Pot Farm, Opera Mini, more on our top 20 emerging Facebook apps by MAU

Birthday Reminder took the top spot in our top emerging Facebook applications this week with a 165 percent gain in monthly active users.

We define emerging applications as those that ended with between 100,000 and 1 million MAU in the past week. This week’s top apps grew from between 130,000 and 560,000 MAU, based on AppData, our data tracking service covering traffic growth for apps on Facebook.

Top Gainers This Week

1.  Birthday Reminder900,000+560,000+ 165%
2.  SimCity Social: Get free stuff580,000+410,000+ 241%
3.  Songza360,000+310,000+ 620%
4.  Custom Tab | Star #3680,000+300,000+ 79%
5.  Baseball Heroes920,000+290,000+ 46%
6.  【猛將無雙】★★★★★ 超人氣!你的朋友都在玩739,091+279,091+ 61%
7.  Zaman Tünelinden Kurtul510,187+250,187+ 96%
8.  HTML Page Tab #9660,000+240,000+ 57%
9.  What your Relationship Status says about you!440,000+210,000+ 91%
10.  Pot Farm900,000+200,000+ 32%
11.  Jetpack Joyride940,000+180,000+ 29%
12.  Veetle230,000+160,000+ 229%
13.  Preguntas y Respuestas280,000+150,000+ 115%
14.  Opera Mini380,000+150,000+ 65%
15.  HTML Page Tab #10610,000+150,000+ 33%
16.  BILD Profil-Badges150,000+149,200+ 18,650%
17.  Journey of Jesus: The Calling620,000+140,000+ 29%
18.  Sweepstakes720,000+140,000+ 26%
19.  Global.mnet.com200,000+130,000+ 186%
20.  Hangman220,000+130,000+ 144%

Birthday apps like Birthday Reminder typically grow quickly because they prompt users to share messages and invite their friends to the app, but there is often little reason for users to return.

No. 2 on our list, SimCity Social: Get free stuff is a page tab application where users can collect virtual goods by Liking the SimCity Social page, sharing posts on their Timeline, and providing an email address. It has grown to 580,000 MAU in about a week and a half.

Music service Songza came in at No. 3, likely as a result of its new iPad app. The web and mobile versions integrated Facebook Open Graph in September, and now with new iPad users, the app saw 620 percent growth in the past week.

No. 10 Pot Farm continues to experience a resurgence, steadily approaching 1 million MAU where it had been two years ago.

No. 14 Opera Mini has been rising quickly since its new browser for feature phones and Blackberry launched at the end of May. The browser includes a “Smart Page” feature that provides a summary of news from a user’s Facebook and Twitter accounts.

All data in this post comes from our traffic tracking service, AppData. Stay tuned next week for our look at the top weekly gainers by monthly active users on Monday, the top weekly gainers by daily active users on Wednesday, and the top emerging apps on Friday.