Facebook's (FB) Android app base nearly tripled to 192.8M monthly active users (MAUs) from Sep. '11 to Nov. 12, according to figures turned up by researcher Benedict Evans. The iPhone app's base rose only 62% to 147.2M. However, the penetration rate for the Android app was only around 35%, no doubt due to the large number of Android users residing in China and other emerging markets. Also: a Facebook app for feature phones had 82M MAUs, its iPad app 48M, and Facebook Messenger 56.7M. Total mobile MAUs (inc. Web users) amounted to 604M at the end of Q3.