News aggregation app Summly launched with a splash on 1 November, promising a slick, swipeable way for people to quickly read summaries of news stories relevant to their interests.

How did that go? The startup has published some figures, including the headline claim of 500k users signed up in its first four weeks on the App Store.

Summly adds that its users have read more than 30m summaries of news stories in those four weeks – so around 60 per user – and spent more than 21 minutes each using the app in that time.

They’re not doing a huge amount of social sharing, mind: the app’s ‘Summflower’ sharing icon, which pushes stories out to Twitter, Facebook and email, has been used 825k times in that first month.

Perhaps unsurprisingly, Technology is the most popular news category on Summly so far, followed by Entertainment and Business. The Wall Street Journal, The Guardian and TechCrunch are its three most popular sources.