Developers in the United States beware, you’re losing market share. That’s the word from app analytics firm Flurry, which released research today that shows 45 percent of apps recording data through Flurry Analytics as of the start of June 2011 were made in this country. That’s fallen off to just 36 percent as of June 2013.

In a blog post discussing the numbers, Flurry CEO Simon Khalaf notes that apps made in the United States still see the strongest engagement numbers. Flurry also considered how the picture changes if apps are weighted by total time, which takes into account both user numbers and engagement. 

“Once time is taken into account, things look considerably better for the U.S., suggesting that, on average, user numbers or engagement are greater for apps made in the U.S. than for apps created elsewhere,” Khalaf wrote, adding that this makes sense given the size of the U.S. population, the fact that it was an app pioneer country, and the number of English speakers in other countries who might be able to use U.S.-made apps without any localization. 

Still, even this weighted percentage of active apps by developer country sees apps made in the U.S. falling off from 75 percent in 2011 to 60 percent in 2013. 

Khalaf says the numbers show that the app market is trending towards globalization, which is he says is due to a number of factors, including the strength and reach of the App Store and Google Play, as well as the relatviely low cost of developing apps.

Khalaf notes that as of June of this year, developers in 23 countries contributed at least 1000 apps to the more than 350,000 apps Flurry measures worldwide.