Hey ragemoody,
I bought the following cable:
https://www.amazon.de/gp/product/B075V5JK36/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
(uni USB C zu HDMI-Kabel(4K@60Hz), USB Typ C zu HDMI 2.0 Kabel [Thunderbolt 3 kompatibel])
Unfortunately, my IPad is not outputting the maximum resolution that is possible using this cable.
So I can not recommend this cable, even though they sell it as HDMI 2.0 cable.
I've read, that the HDMI-Ports of the Monitor (38WN95C-W) are HDMI version 2.0. So it definitely should be possible to transfer the 3840x1600 pixeils using an HDMI 2.0 cable.
Maybe the issue is, that HDMI is not using the Displayport protocol. This might cause a loss of resolution.
I'm currently using my monitor in combination with an 5 year old laptop (NP870z5g-x01de). I guess this laptop only has an HDMI 1.4 Port, nevertheless it can handle the 3840x1600 resolution using the HDMI cable that has been shipped with the monitor (5K ready).
For comparison I took two photos of my monitor screen when the same picture (res: 3840x1600) was shown. One time using my IPad Pro and one time using my laptop. I used the standard photo app by apple on my IPad and the standard photo program by Microsoft on my laptop.
The picture that looks sharper was outputted by my laptop.
IPad using the cable that I mentioned above:
Laptop using LG's HDMI cable:
I don't exactly know what the problem is.
Maybe I should have picked a USB-C to Displayport cable, because the IPad Pro is using the Displayport protocol to communicate with the monitor.
Or maybe they just sold a really old HDMI version that I don't even ever heard of.
I tried quite a few apps on my IPad in combination with the monitor.
Netflix (4K,HDR subscription) --> I tried to play titles that websites stated, that it is available in 4K on Netflix, but the IPad definitely wasn't able to output the maximum possible amount of pixels.
Amazon Prime Video: also no success.
AppleTVapp: Maybe it was HD, but definitely not more. As far as I know, you have to purchase one of these Apple TV Hardware type of things to enjoy 4K and HDR (but why... ;( )
Maybe it is a software issue, so it is not possible use this monitor with max resolution.
I would recommend you to try an USB-C to HDMI-2.0 cable. Maybe this works better, considering the IPad uses Displayport protocol.
If you buy such a cable and have success, please let me know. I would low to get the most out of my monitor using the IPad Pro.
Best regards
DezzardHD