Recent research by Localytics, a mobile engagement platform, shows that there’s a strong negative correlation between the number of sessions users have post-install and user churn rate. The more sessions app users complete in the first 30 days after installing an app, the less likely they are to become inactive and eventually uninstall the app. The big question: how many sessions do users need to have in order to reduce the risk of them churning?I saw this firsthand while working on a casual game: when we noticed the differential in retention rates between folks who sign in via Facebook and those who don’t, it was enormous. For this particular game in question, users signing in via Facebook had a 20-30% higher upstream and downstream retention rate than those who weren’t.