SAN FRANCISCO: Mobile social network Instagram has announced that its userbase is increasing at a rate of 10% a month, with around 90m people now regularly accessing the app.

The company also revealed that around 40m photos are being uploaded by users each day, with 9,500 likes and comments being added each second.

Instagram's 90m userbase only includes those users who access the app at least once a month, meaning that overall subscription numbers are likely to have surpassed 100m.

Speaking to All Things D, Instagram co-founder Kevin Systrom said: "With many of the product and internationalization improvements we've made, we've been excited to see these efforts resonate with users globally."

Instagram hit the headlines in 2012 when it was acquired for a reported $1bn by Facebook, the world's largest online social network.

It ran into controversy in December when it announced a change to its terms of service that suggested photos shared via the app could potentially be used in ads for third parties in the future.

Analysis of the app compiled by analytics firm AppData and released later in the month suggested that daily active users of Instagram had dropped by around 25% over the days following this announcement.

Meanwhile, data reported by TechCrunch shows that Facebook, which retains over 1bn active users, has around 37,000 likes and comments added to the site each second.

Data sourced from All Things D/TechCrunch; additional content by Warc staff