Facebook Inc. acquired a technology startup in India as the largest social-networking service seeks to bolster its presence among mobile-device users.

Facebook bought Little Eye Labs, which develops tools that Android application developers can use to analyze and enhance efficiency of mobile apps, the Bangalore, India-based company said on its website. Financial terms weren’t disclosed for Facebook’s first purchase in India and Carson Dalton, the India spokesman of Menlo Park, California-based company, declined to comment on the terms of the deal.

Billionaire Chief Executive Officer Mark Zuckerberg is stepping up efforts to help Facebook, the top seller of online advertisements after Google Inc., generate more of the company’s ad revenue from mobile. Ad spend by U.S. companies on mobile devices will account for 23 percent of digital-ad expense in 2013, up from 12 percent in the previous year, according to New York-based researcher EMarketer Inc.

The company is focused on producing useful and engaging mobile apps, Subbu Subramanian, Facebook’s engineering manager, said in an e-mailed statement.

“The Little Eye Labs technology will help us to continue improving our Android codebase to make more efficient, higher-performing apps.”

Little Eye Labs, whose entire team will move to Facebook’s headquarters in Menlo Park, was set up about a year ago, according to the statement. Founded by Kumar Rangarajan, it received financing from angel investors GSF India and VenturEast Tenet Fund, according to Little Eye’s website. (Bloomberg)