Add features to native android app -- 3

I have a podcast android app. I need the following features added to it. # download episodes on device (mp3 from RSS feed) # playback of downloaded media (exo player already integrated) # subscribe to podcast (API ready) # save podcast metadata in roomdb # save podcast metadata and subscription data on server (APIs ready) # check for new episode (background service on device) # notification of new episodes - service on device # Display podcasts and banner on homepage from db (API ready) # Populate Top 40 charts (API ready) There might me some UI work involved.