The Amazon Prime app for Apple TV has some great features (e.g.: X-Ray tells you the actors in a scene when you pause) but is the cheapest-looking app I’ve used on any platform in decades.
@gruber They’ve also curiously withheld Dolby Vision from the Apple TV app with no explanation. https://www.flatpanelshd.com/news.php?subaction=showfull&id=1662969021
Amazon Prime Video is warming up to Dolby Vision after HDR10+ bet

After a 6-year hiatus and an HDR10+ partnership with Samsung

FlatpanelsHD