How you get Tidal to DX200 without Google Play store?
On your pc / mac, you go to
playstore then search for Tidal. Copy the whole URL (in this case = https://play.google.com/store/apps/details?id=com.aspiro.tidal) then go to https://apps.evozi.com/apk-downloader/
Paste the tidal url and click Generate Download link then download it. Now you have tidal APK.
Now to your DX200, go to setting > Security > Unknown sources turn it on.
Plug DX200 to your pc /mac, make sure it's in File Transfers mode then copy / move Tidal APK to where ever you want. Open file explorer, go to where you put APK, then open it. Install >> Enjoy