Which music software(s) or apps do you use on your computer or smartphone?

Sorry I asked.

The music app or software doesn’t change the sound quality unless you enable specific settings like EQ, MSEB, cross-feed, etc. The software itself cannot change the sound quality if it plays back your file format of choice natively.

@mlsstl 

I was asking more about apps on android phones and programs on Windows 11 computers that are used for music playback. I want something that is possibly even more feature rich.

I use JRiver on my computer and don’t like foobar. 

I use the hiBy music app when I travel with the HiBy FC1. I can (sort of) get the sound to be similar to my main headphone rig by skillfully using MSEB. It's not the same, but it's pretty close.

For a computer windows media 64 bit, with all the bells and whistles set correctly, for a phone android Pulsar+

Thanks for providing some actual information.  I don't use Windows for music control. On  my Linux laptop I use LMS for control.  On my phone and tablet I use one of several options -- Qobuz Connect, the WiiM app, or Material Skin. I find no audible difference between them as they are just selecting the music to play and not altering the data stream. Which one I use depends on which of my systems I'm using and which is going to be the easiest for finding the music I'm interested in at the moment -- for example, Qobuz Connect has no access to my local collection. 

Finally the mods have tired of frankie. Good riddance.

 I use Tidal and Roon for creating playlists and my Windows directory to sort music to a thumb drive for  the car. As for software running on a PC you have know idea the phase errors signal problems  created. I have compared the music quality of streaming against vrs the same music from a CDs. The CDs were played on PS audio transport and and a OPPO 205, the steaming can be just as good if not an improvement over Disc. The computer and other audio device can create distortion, via ground loops, switching noise and degrading the signal shape. The Audio device or PC can cause like impedances issues,clocking and noise.

Do PC designers care about the output impedance or signal shape, ect for the DAC, Nope. Many companies buy cheap recovery circuits are it's integrated in cheap DAC chip. Jitter, noise, signal shape degrades and the input performance of the DAC.

The poor characteristic of many components ie. PC's and audio gear will degrade the DAC's reclocking circuit. The clock recovery can be game changer if done correctly. I have tested these condition and problems in the lab at Texas Instruments with HP/Agilent spectrum analyzers, Tek distortion analyzer. If you do a lot of streaming it best to use box like Optical Rendu, it will reclock and reshape the data, it's an obvious performance improvement. Checkout www.SmallGreenComputers.com