AntiiQ is an offline Android Music Player with some opinionated features and a distinctive User Interface tailored for large music libraries and collections.

Features

Offline
It plays Audio
Directory selection
Customization options
Backup and restore user preferences and Playlists
Equalizer
Pitch, gain and speed tweaks
Embedded Cover Art support
Long press and drag to reorder playlist Items
Search functionality
Playlist generation and automatic queue extension features
Swipe a track left to access other options (Works with Songs, Album Songs, Genre Songs, Artist Songs and Playlist Songs)
Persistent selection feature: Tracks can be selected across multiple screens(Albums, All Songs, Artists and Genres) and the selected tracks can also be accessed in the "Selection" screen on the main dashboard.
Long press a track to begin selection
Other subtle features that enhance user experience.