Continuing to release new online tools and projects, Shutterstock announced Spectrum, a new "image discovery tool," in March 2013, and Skillfeed, a subscription-based online marketplace for instructional videos, in June 2013. In August 2013, Shutterstock announced it would integrate its library with Facebook's Ad Creator, allowing advertisers to select from Shutterstock's images when creating ads. In September 2013 Shutterstock launched Offset, a marketplace prioritizing high end curated photos, and a few months later the company launched its first Android app. Shutterstock opened offices in Berlin, Germany in October 2013. At the time, Shutterstock stated it served 750,000 customers, with 30 percent of those customers in Europe. Shutterstock's shares had reached a $2.5 billion market value by the fall of 2013, while revenue for 2013 was USD $235 million.