It plays UHD iso / folders in Dolby Vision and HDR10+ . It also plays the media back correctly in any colour space that u select, ie YCbCr 4:2:2 / 4:4:4 correctly and because the conversion from 4:2:0 is done correctly the picture is sharper. Autoframe rates work without glitches as well (but some media players get this right as well).

It is not Android based (Linux based OS) so no apps etc.

Yes. The UI is exactly the same as Oppo and it runs on the Oppo 20x Jailbreak firmware. The one on mine is the latest firmware 65-0131. I added a link to a video review in the 1st post. U can see the UI and others, but need to turn on subtitlses