Harmonoid is a modern music player for all platforms, it very strictly implements Material Design to be a consistent, cohesive & fluid.
There are no inconsistent paddings, spacings or weird alignments to make you feel uncomfortable. It's built with care & proper time is given to everything. Guidelines for animations by Material Design specification are also closely implemented.
It offers a decent number of features (few being unique), without being confusing to a new user.
Harmonoid is in active development & the growing list of features can be seen here:
• Music library management based on metadata tags.
• Capable of indexing 30+ files/second & saves cache for future app start-ups.
• Sorting based on date added, year or A to Z.
• Time synced lyrics, automatically loaded from internet or .LRC files.
• Pitch shifting.
• Volume boost.
• Speed adjustment.
• Multiple artist support, splits artist tag.
• Ignore files based on minimum file size.
• Manual multiple folder selection for indexing.
• Audio output details e.g. bitrate, sample rate & channel count.
• .LRC file compatibility (manual loading or automatic lookup in folder).
• Fallback cover support e.g. cover.jpg, Folder.jpg etc.
• Cross-platform (currently running on Windows, Linux & Android).
• Dynamic coloring, based on currently played song or content.
• File/URL player.
• File/URL metadata reader.
• Gapless playback.
• Details editor.
• Persistent playlists.
• Queues & permanent playlists.
• Customizable grid size.
• Excellent backward compatibility. Supports as back as Android 5.0.
Hope you have fun! It's built with a lot of love & effort.
Feel free to share how you feel or any other issues you discover.