Dojo I use this app, and it is INCREDIBLE!
The author says the Google Play Services and Store are needed for I believe it was 3 days for license verification to prove that the app was bought legitimately. so for 3 days after installation you MUST have the three Sandboxed Google Play apps installed, with none of their services, receivers or provider components blocked, and network access to all three enabled. Otherwise it will quit as soon as you open it!
This app also has the ONLY great parametric equalizer that I have found. (except for Wavelet maybe, but it's not as good IMO) That is another in app purchase that needs verification over this time. Also, the app can be a full MQA decoder and decode local MQA files before transmitting them to Bluetooth! I bought this because I sometimes have my iFi Gold Bar or iFi Gryphon plugged in, and they are full MQA decoders so it doesn't matter, but sometimes I have my phone streaming to the iFi Gryphon using Bluetooth LDAC 990kbps (so close to lossless it's indistinguishable!) For those times, it really helps to be able to have USB Audio Player Pro decode all the MQA files I've ripped from Tidal!
All in all, the ONLY music player other than streaming from Tidal I ever use. It does allow direct use of your USB DAC/amps, and amazing audio quality through a Bluetooth connected DAC/amp as well. I have both kinds, very high quality and also incredible headphones that reveal all flaws in a system and I can tell you for sure that he audio quality put out by this app is far superior to what comes out of other music apps! I have almost 100GB of audio files on my phone for playing through this app. Tried Poweramp + Wavelet, which could be another option for you, but it is another paid app. I didn't like it as much though. Has a lot of features, but overall not quite as advanced or as configurable.
...I may be a bit of an audiophile... Music quality means a LOT to me, and this is the BEST you will find on Android, which happens to be, as a platform for mobile music 1000X better objectively than iOS!