Phoenix, just curious, and genuinely asking.... What softwares have you tried on mobile phones and PCs?
On my Windows PC, after trying few softwares in the past , I found Foobar is difficult to beat and never look for others. Yes it has very good modularity and plugins, but I also found it to sound better than most other software player. On foobar itself, I could hear it perform substantially better with WASAPI than Windows Direct Sound when driving External DAC.
With my LG V20 built-in DAC or TWS, I also prefer Foobar to Hiby, Fiio, Dead Beef, Onkyo HF, etc. and even LG own Audio player. (Note: I never try paid player such as Neutron or UAPP). I haven't tried a lot of my mobile phone driving external USB DAC cause it will eat battery quite fast. But at least I found that Hiby that sound so so with Android audio stack will transform many folds once I set it to drive USB DAC directly. Hiby for USB DAC surpassing Foobar, because Foobar cannot drive USB DAC directly..
I don't use Eq or PEQ on my software players.