I find Poweramp the only player capable (without glitches or lack of basic functions) of providing navigation without the need to look on the screen - music is for listening, not watching. I'm talking about lockscreen and its swipe navigation. Hovewer it needs polishing - 2 additional features: 1. swipe to move seek bar - inside as song: I would consider adding an option for that and implement it by aplying the same geasture as for swipe-to-move-to-the-next-track but with keeping pressing after swipe. Of course any other clever geasture would suffice 2. option to remove/block other ways of nav