Another quick update.
Been playing with a few apps. Installation is as easy as 1-2-3. Either google for the name of the app + "apk" or use steps suggested
here. Once you download apk files, copy them to uSD card (not the internal memory cause fw update will delete it). Also, in Settings under Security make sure you have Unknown Sources checked to enable installation of 3rd party apps. Go to Explorer, navigate to your uSD folder with apk files, and click to Install it. Furthermore, keep in mind, once you do Factory Reset, apps will be deleted, so you will have to go back and re-install them again from uSD. But as long as you keep it on the card, all the files should be there.
OK, so installed a few apps for testing (Hiby, YT, Unblock Me, MX Player, Netflix, Klondike/Solitaire, Spotify):
Right off the bat,
YT doesn't work because it requires Google Service to be installed.
Netflix had issues where some shows did play (I hear audio, but not the video) and some had both audio/video with a choppy audio.
MX Player works great - high res video and audio in a perfect sync. I think audio/video app functionality is part of the driver compatibility, and I believe MX Player uses its own drivers to bypass the system. I know, people would get DX200 for audio, not watching movies, but this DAP got a beautiful high res screen with deep rich colors, on par with my Note 4 smartphone, excellent viewing angle too. Just a shame not to take advantage of this large screen and to be able to play a few movies. So, you can now with MX Player. Hopefully other driver compatibility will be fixed. I know FiiO had/have the same issues.
Games,
Klondike/Solitaire and
Unblock Me works perfectly. Fast, responsive, solid performance, never crashed on me. Keep in mind, DX200 got 2GB of DDR3 RAM, so no issues running apps.
Hiby Music player - works perfectly, but the sound quality is downsampled to my ears. It's clear, but sound is a bit flat. Switching to Mango app - and you are back in business with a dynamic expanded crystal clear wide sound. In Hiby under Advanced setting and SRC mode, when enabled only shows 44.1k sampling rate, everything else is not supported for now. I believe this has been mentioned by iBasso, they will/should implement support in the near future.
Now, saved the best for last,
Spotify - works, sounds, and looks perfectly! I don't have subscription to any streaming services, can't test Tidal and can't test Spotify off-line download, but in a free user mode and shuffle play - there are no issues. I walked around the house while listening, wifi connection is solid, audio is clear and dynamic (to my ears sounds better than Hiby playback).