Sure, but features running slow make me give up using them after a while. E.g. freezing youtube. Yeah, i play youtube on it to listen via speakers. And the list is endless, usb dac mode is not always activated or it is but no sound, no volume control sometimes, no eq while playing. It is too much. Luckly the sound is good, not great but good. But i ended buying features i find unusable.
By the way, i've been having one thing in my mind to tell fiio management. They advertise their daps as having "highly customized android" or whatever. They should ask their developers about it, highly costumized always, ALWAYS! and there is no exception to the rule, means highly problematic. And it is clear by looking at the final result, this dap in our case. For sure they rushed things too much, leaving no room for their developers but to do a poor job. It doesn't have to be perfect, but not poor by all means.
So,
@FiiO and whoever decides your next moves, start with clean, pure, no custom apps added android. Then bypass android drivers so sound is directly bit perfect handled. And that's it. Ok, add your pure music app too. No other customization needed.