Indeed, it’s interesting to know the adoption rate of the smart devices around the world. The adoption speed of smart devices is faster than 10times of the PC revolution in 80s, while it’s 2 times faster than 90s Internet surge. The smart device adoption is even three times faster that the recent adoption of social networks. According to a Flurry’s recent study, conducted over 640 million Android and iOS devices in use during July 2012, the U.S. and China were holding first and second positions with 165 millions and 128 millions active iOS and Android  devices respectively till July 2012.

The net active devices in the U.S grew by almost 30 million compare to 100 millions of China during a year period ended July of this year. It’s clear that china is narrowing the gap between itself and the U.S. in terms of active Android and iOS devices and it’s also expected that China would surpass the U.S. by the end of this year.

However, compared to the last year, the positions of top 9 out of 10 countries across the world remain unchanged in terms of active mobile devices except Brazil, which pushed Australia to 11th position.

In the U.S., year-over-year app sessions declined as proportion to worldwide session from roughly one-half in July 2011 to a little over one-third in July 2012, while Y/Y app sessions of rest of countries (ranks 2 to 9) mounted up to 36% in July 2012 from 27% in the same month of the last year. In addition to these, Y/Y app sessions of the rest of world also grew to 28% in July this year from 21% in July 2011. According to the study, 64% of all apps sessions is existing outside the U.S..

Astoundingly, China is at the top in the fastest growing iOS and Android markets by active devices, recorded 401% Y/Y growth during a year period ended July of this year, followed by Chile, Brazil, Argentina with 279%, 220% and 217% year-over-year growth respectively.  It’s clear from the below graph, all BRIC countries (Brazil, Russia, India and China) are among the top ten fastest growing countries. India and Russia showed off an incredible year-over-year growth of 171% and 189% respectively during one year period ended July 2012.

Moreover, Flurry has tried to compare penetration of active devices country-wise among adults aging 15 to 64 years. Singapore, Hong Kong and Sweden were at first, second and third places with 92%, 87% and 86% respectively in terms of penetration of Android and iOS active devices among 15-64 years old. On the hand, the U.S. and U.K were at the fifth and ninth notches till the end of July this year in terms of Android and iOS active devices penetration among adults aging 15-64 years.

Anyway, the study is quite informative which describes how the Android and iOS active devices are growing around the world. However, the apps session in the U.S. has been declined compare to the worldwide proportion during one year average period ended July 2012. Penetration of active mobile devices (Android and iOS) is tremendously growing in the BRIC countries year-over-year and we could expect a continuous growth of these active devices in upcoming years.