Pauline has a well-established app with a large user base. Now she needs new users who complete valuable actions within the app. What phase does this fall under?

The Maturity phase is correct because Pauline's app is well-established with a large user base, indicating it has moved beyond initial growth. In this phase, the focus shifts to acquiring new users who perform valuable in-app actions, and re-engaging existing users to maintain and increase lifetime value. The Launch phase is incorrect because it pertains to the initial release and early adoption. Growth is incorrect as it focuses on rapidly expanding the user base, which Pauline has already achieved. Engagement is incorrect because while important in Maturity, it's a continuous process across all phases, not a distinct phase itself in the app lifecycle.