-Please get you active users to propagate your app through asking them for reviews in App Store , prompting for Facebook like , share on what's app with friend . With change in AppStore ranking algorithm reviews will help you generate good ranking and place higher in search results.
-If the economics allows gratify them with some offer for referrals ( may excess to any premium feature for a limited time , or points , discounts etc whatever is possible )
- rebuilt you visibility through a campaign where you do 1or burst activities towards weekend starting Thursday evening and sustain with normal activity ( 1/5th of burst) for few days .
- also you must see you LTV per active user and basis that work on activating the dormant users or put this data to use to acquire new user with above mentioned tactics