Mobile marketing firm Swrve has published data on how users interact with the applications on their smartphones. The average retention rate shows 26% of users returning to an app for a second time within a forty-eight hours of first opening the app, although over a third of activity with a mobile app lasts less than one minute

http://www.forbes.com/sites/ewanspence/2014/07/17/mobile-developers-must-engage-and-retain-users-quickly-says-swrves-latest-app-report/