for most apple devices, HDR-ready shows / movies will be Dolby Vision (another form of HDR) - tuned by Dolby.

HDR 10 (i assume this is the one you are referring to) is also available for iPhones, but very very limited only. to determine if the show supports HDR/Dolby Vision, just tap the show and it will appear on show's page itself. whatever icon that is available there, is based on the capabilities of your device.

of course, all these are also subject to the availability of the show - if it supports these technology.

for example:

Dolby Vision, HD, Spatial Audio

means that you device supports all 3 of these. to test another theory, open the same show on your 4K tv or with an Atmos enabled sound system, you will see; Dolby Vision, 4K, and Dolby Atmos.

hope this help

This post has been edited by andrewtho: Jun 8 2023, 10:41 AM