Can you use HI-FI DAC on LG V10 for youtube or radio?

[AC Question]

I was wondering is there someone who have LG V10 with downloaded app from play store: "DAC fix for LG V10", which allows you to use HI-FI in any other music app, instead LGs music software and did you try to use app for listening on youtube or online music or you must first download music on phone to work HI-Fi? Is HI-FI works with FM radio?