Apsmart was founded in 2009 by venture capitalist firm DN Capital and Ruhal Powar, creator of the music recognition iPhone application Shazam.
Thomson Reuters claims that the acquisition will enable it to design and develop new interfaces for mobile that deliver 'expert-enriched content' to professionals on a number of devices.
"This new team brings strong experience in end-to-end mobile development capabilities from user experience and design through to product realization and platform services," said Robert Schukai, global head of mobile technology at Thomson Reuters.
He added: "As we move forward, we will have a greater ability to develop foundational mobile capabilities that build significant brand value in our mobile product portfolio."
The value of the deal has not been disclosed.