UK-based social networking start-up, Urturn, has raised $13.4m in venture capital from Balderton Capital and Debiopharm Group to expand its business and develop the product.

The company has also introduced its mobile app for Apple’s iOS to make the tool easily accessible to its users.

After being launched in the UK as a service called Webdoc in 2011, the start-up was re-branded and re-launched in January 2013.

The social network enables users to edit videos, pictures and music clips, and share them on Urturn itself, as well as on other social networking sites including Facebook and Twitter.

Urturn chief executive Stelio Tzonis said: "While existing social platforms have focused on connecting people and all provide finite ways for interacting online, the company has focused on how people interact – providing an ever-growing variety of rich and playful ways for users to express themselves.

"Born out of the acknowledgement that users want to be more expressive, Urturn is the next natural step for social media," Tzonis said.

"We believe our mobile app will make Urturn more accessible and enable people to share Expressions more spontaneously."

Its templates offer the ability to doodle, add speech bubbles and link SoundCloud and iTunes tunes with photos and convert images into polls.