RecSpot had a major dip in user retention.My assumption for what key improvements needed were:

Core features that did not match similar social platforms, making it harder for users to learn and recall new information about the app.

Each feature has unusual naming, putting more cognitive load on the user, plus other interaction issues. These may be causing the users to leave the app and not return.

Simplifying feature locations and provide just in time help for names of categories to foster a useful experience.