Retention, Retention, Retention.
A compelling, if occasionally confusing, blog from Flurry on mobile app user engagement over time. The summary:
These results imply that developers need to make retention their top focus. The association between retention and time spent implies that retention drives revenue. More repeat usage means more opportunities to generate revenue.
Acquiring aggressively before an app retains well can be a costly mistake.
The more a developer masters retention, the better their chances of turning their Red Dwarfs into Superstars.