App Annie today unveiled the App Annie Index, a monthly report that charts and analyzes major revenue and download trends. On Google Play stores worldwide, Japan rules for the revenue, USA for the free downloads but Korea is just behind.

Asian publishers are becoming the leaders on Google Play and iOS

According to the App Annie Index, Japan overtook the U.S. in Google Play revenue in October, marking the first time the U.S. did not rank number one for revenue on Google Play. Since January 2012, Japanese app revenue on Google Play has multiplied by more than 10 times while U.S. revenue has doubled. Korea, home country Samsung, now stands as the nation driving the most free downloads behind the U.S., eclipsing download volumes in Japan by nearly two times. India is also starting to show its distribution muscle, coming in at third place, ahead of Japan, and accounting for 6.2 percent of global free downloads. On Google Play, the Top 10 by revenue includes 4 publishers in Japan (1 DeNA, 2 Colopl, 3 GungHo Online, 7 Gree), 4 editors in South Korea (4 WeMade Entertainment, 6 Gamevil, 8 Naver, 10 NextFloor), one in the USA (Zynga), and one in France (9 Gameloft).

In October 2012, iOS global app store revenue was four times larger than that on Google Play. However, Google Play revenue grew an astonishing 311 percent for the year-to-date, compared to iOS revenue, which grew a modest 12.9 percent. It's a different story when looking at free downloads, where Google Play slightly lagged behind iOS in download volume, but grew an impressive 48 percent for the year-to-date compared to just 3.3 percent growth for iOS. On iOS, revenue in Japan is still well behind the U.S.—14.4 percent compared to 32.7 percent respectively. However, Japan is catching up month-by-month, with the country taking an increasingly larger share of global revenue and the U.S. taking an increasingly smaller share.

At the beginning of the year, the U.S. accounted for 33 percent of all global iOS downloads. Nine months later, in October, the U.S. accounted for just 25.3 percent, with China not far behind at 15.3 percent. In line with the macro trends App Annie has seen at a country level, publishers from the U.S., Japan and Korea are dominating publisher revenue charts. On iOS, Japanese and U.S. publishers account for eight of the top 10, while on Google Play, a staggering eight of the top 10 publishers by revenue are from Japan or Korea. For October, 4 of the top 10 iOS publishers by revenue were American (1 Electronic Arts, 3 Zynga, 5 Apple, 9 Kabam), 4 were Japanese (6 Applibot Inc, 7 Square Enix, 8 GungHo Online, Gree), one comes from Finland (2 Supercell) and one from France (4 GameLoft).