This week’s list of fastest-gaining apps on Facebook by daily active users doesn’t contain any big surprises. Most of the significant entries are new games, a category that is having a particularly booming week.

As usual, mobile apps also figure prominently, with Facebook (for iPhone) leading the non-game apps at number two. The only oddity this week is that HTC Sense, which mostly serves Android phone users, has blown past Facebook for BlackBerry with over twice as many new DAU. As we recently noted, Facebook for Android is also a significant app, although Facebook has thus far had a bug in that app’s reporting.

Here’s the AppData list:

	Name	DAU	Gain	Gain, %
1.	Hello City	619,495	+321,453	+107.85
2.	Facebook	19,138,717	+273,557	+1.45
3.	Static FBML	4,747,235	+241,322	+5.36
4.	EA SPORTS FIFA Superstars	430,985	+229,086	+113.47
5.	Birthday Cards	791,670	+169,834	+27.31
6.	Baking Life	414,130	+150,693	+57.20
7.	HTC Sense	1,322,860	+131,794	+11.07
8.	Fashion World	192,629	+113,620	+143.81
9.	Millionaire City	168,003	+84,135	+100.32
10.	Lovely Farm	84,118	+76,718	+1,036.73
11.	Zoo Paradise	900,202	+67,749	+8.14
12.	Vampire Wars	459,100	+65,315	+16.59
13.	Bola	665,127	+60,637	+10.03
14.	Facebook for BlackBerry® smartphones	10,736,621	+57,644	+0.54
15.	Games	601,892	+56,412	+10.34
16.	Crazy Cow Music Quiz	176,075	+44,996	+34.33
17.	Animal Paradise	759,290	+41,817	+5.83
18.	Happy Aquarium	2,603,572	+39,953	+1.56
19.	Zoo World	1,259,674	+38,318	+3.14
20.	Likeness	144,327	+37,507	+35.11

Hello City, a city building simulation, is the overall leader, with the next closest game being EA SPORTS FIFA Superstars. Both of these games are maintaining a lead they assumed earlier this week; and they’ve probably been joined by Zynga’s FrontierVille, although reporting problems are affecting that app’s stats for now. However, there are several less known titles further down, like Millionaire City and Lovely Farm. For more coverage on those, check out our sister blog, Inside Social Games.

Birthday Cards, at number five, has long been RockYou’s biggest app. However, it’s currently down over 10 million MAU, and almost a million DAU, from its peaks. Over the last week, it has recovered some DAU, although that state of affairs may not last. Zoo World and Likeness, way down at numbers 19 and 20, are two more RockYou apps with similar stories. You can see the general trend in RockYou’s DAU chart, below.

Unfortunately, that about covers it for the non-game apps, unless you don’t count Crazy Cow Music Quiz as a game; as trivia, it’s arguably not in the same category as a farming or town management title. It’s also one of the few apps on Facebook to include a significant amount of popular music, although it escapes licensing requirements by only playing short clips.