Yahoo has acquired Cooliris, which makes the photo aggregation app of the same name, as the web company continues to bolster its app expertise.

Cooliris announced that it had been acquired by Yahoo in a statement on its website, although no figure was revealed.

“Yahoo has a clear vision and unwavering commitment to making mobile an intuitive and effortless experience,” Cooliris said, adding that this makes Yahoo a “perfect partner” for the company.

Cooliris recently added to its products with visual messaging app Beamit Messenger, which, like the Cooliris app, will continue to be supported “for the time being”, according to the statement.

Yahoo has revamped its mobile offerings and acquired developer talent and app technology under the stewardship of CEO Marissa Mayer over the past couple of years.

During the third quarter, the company built on its mobile strategy with the acquisition of mobile analytics company Flurry.

Mayer claimed that the company’s revenue growth in the third quarter was the result of progress in the new investment areas of mobile, social, native and video.

“Fundamentally, we are moving from a company that makes web pages and monetises them through banner ads to a company that makes mobile apps and monetises them through native ads,” she noted.

In terms of engagement, the company had around 550 million mobile monthly active users by the end of the third quarter, up approximately 17 per cent year-on-year and more than doubling since the company renewed its mobile efforts in October 2012.