Facebook has posted its slowest quarterly growth in two years as income fell by 20 percent to $509m (€475m) - this was due to a focus on R&D spending - gross revenue increased by 42 percent to $3.5bn.
Its number of monthly active users grew to 1.44 billion - 13 percent higher than the same period in 2014.
83 percent of these users (nearly 950m) access the site on a daily basis
The amount of users accessing Facebook through its apps (as opposed to the website) increased by 24 percent to 1.25 billion - this is 87 percent of the company's total users.
The R&D spending increases mainly relate to products that have been acquired by Facebook - it hopes to expand its photo sharing app Instagram, and to develop Oculus Rift, its virtual reality headset.
Facebook is also transforming its Messenger platform into an entertainment and e-commerce hub - while WhatsApp will be maintained as a "utilitarian" messaging service.
"This was a strong start to the year," said Mark Zuckerberg, Facebook founder and CEO. "We continue to focus on serving our community and connecting the world."
