Features include:
•  Display by song, album artist, album, artist, playlist, composer, genre
•  5 Band Equalizer
•  Equalizer Presets
•  30+ themes
•  Material Design
•  Download and display lyrics (download requires Lyrics app)
•  Album Art Management
•  Tag Editing
•  Play Android supported formats (.wav, .ogg, .mp3, .3gp, .mp4, .m4a – advanced formats require Rocket Player Premium)
•  Batch selection – for selecting multiple songs at once to add to playlist, eq
•  Custom lockscreen
•  Chromecast support for songs
•  Downloaded* and embedded lyrics display
•  Sleep timer
•  Playlist manager
•  Playlist shortcuts – launch playlists from your home screen
•  Live list playlists create playlists from song metadata, user generated metadata (play counts, time, date, etc.) and more.
•  M3U, M3U8, PLB playlist support
•  Podcast manager
•  Podcast bookmarks
•  Scrobbling support
•  Many more features

Upgrade to Rocket Player Premium Audio for:
More audio formats: alac, tta, ape, mpc, wav, flac, wv and wma (except lossless and copy protected)
•  10 band graphic equalizer
•  Premium themes
•  Many more features

Subscribe to cloud features for:
Album Art downloading
•  Artist pictures
•  Playlist backup and restore between devices
•  Auto Tag editing

Combine with iSyncr for metadata syncing back to iTunes
Ratings
•  Play counts
•  Playlist changes
•  Sync embedded lyrics
•  Many more features