I bought UAPP yesterday based on the excellent sound - bravo for that.
However, it has so many *missing* features and bugs that I'm really sorry I cannot just forget it and use a more decent player.
I looked at some of this thread, but it's too big; apologies if some of the items below have already been requested or discussed; btw, it would also be nice for the moderator or someone to collect all feature requests in one post.
Hoping some of these will be addressed, I'll list here a few I collected after just one day:
-BUG: dsd [dff] volume cannot be controlled from the regular volume, only from the 'hardware volume'
-no play resume - the track always starts at the beginning.
-current playing track is not highlighted in folder view
-folder view [possibly others?] should allow text wrapping
-folder view does not show the current path. [it could be instead of or in addition to 'directory up'].
-if I navigate somewhere in folder view [and probably other views as well] and I return to the current playback file, when returning to the folder view I'm moved to the current tune's folder.
-when opening another screen e.g 'playlists' when the current one is 'local folder', playback stops, even before doing anything with the playlists [and the same with other screens]. Playback should continue until a new track is actually selected for play.
-bookmarks [ideally automatically set, for tracks longer than x] - keep a db with where I was in a track; give me the option to resume from that place, explicitly or automatically.
-nice to have: scrobbling to last.fm
-I second this nice to have: api to be used by other apps [I know it's harder to do].
I'm using GMMP and it's light years ahead of UAPP in usability; Poweramp, VLC, are also much better. Too bad the sound is just standard android; perhaps you could get inspired and make UAPP a truly good app as well, or otherwise just collaborate with some of these good players to incorporate your sound libraries, it would be great and we would all benefit!