Appviews Per User (LTV) is a Metric in Google Analytics under the Lifetime Value and Cohorts section
Appviews Per User (LTV) Definition: App views per user for the acquisition dimension for a cohort.
How its calculated: ga:screenviews / ga:cohortTotalUsersWithLifetimeCriteria
Data Analytics & Insights Google Analytics Metrics Appviews Per User (LTV)