Twitter’s live streaming application Periscope passed 10 million accounts, with daily active users at two million, and is “seeing over 40 years of videos watched per day”, the company wrote in a blog post.

It had hit one million downloads in its debut week on iOS back in March, and has now been available for four months.

The company said that it gives a lot more importance to the “time watched” metric – defined as the aggregate amount of time users spend watching live broadcasts through the app – than it does daily or monthly active users.

This is because it believes the metric is “most reflective of the value we’re creating for people and the world” and “optimising for daily/monthly active users doesn’t properly motivate our team to create a product that people love”.

It has been suggested that the popularity of the app, in which Twitter invested $67 million, began to increase after people across the world used it to live stream “the boxing fight of the century” between Floyd Mayweather and Manny Pacquiao.

Not only did Periscope save some US fans $100 in Pay Per View fees, it showed what the application could do.

Later, US Presidential candidate Hilary Clinton kicked off her 2016 election campaign by Periscoping the speech.

However, one of the challenges Periscope is likely to face is content rights issues, especially when it comes to live sporting events, where TV and media companies have spent millions of dollars to gain broadcasting rights.