I've downloaded and tested probably all of the offline music players on Muzoff Store, and this one ranked in the top 3 in terms of functionality. The barebones graphic interface design probably isn't going to win any awards, but I primarily care purely about function, and intuitive controls.
Namely, ability to play, pause, forward, backward, shuffle, edit file names, create playlists, view by artist/genre, and import files from a variety of sources. I also don't want intrusive ads.
Muzoff pretty much delivers on everything, but with one major problem: when I import my mp3 library, Muzoff interface turns white and freezes. I can wait, restart, etc, but it's just the same frozen white screen. Deleted Muzoff and re-downloaded it, but same problem.
I'm trying to import a fairly large volume of MP3 files. Off the top of my head, I'm going to say about 30 or 40. So perhaps the player doesn't support that quantity of imports. Muzoff did function correctly when I imported only about four or five songs. I didn't test the threshold number at which Muzoff would freeze up.
I didn't bother writing reviews of the other off-line music apps, and this review is primarily for the developers, because I really like what they've done, and hope they can fix this one major bug! It's got so much potential. If they do sort it out, I'll probably rate it 4 stars.