so my phone is a Samsung Galaxy Z Fold 4, and the funny thing about basically all social media apps is that they just look absolutely terrible when you view them at a 6x5 ratio. they're not designed to have that much extra horizonal space. twitter just doesn't know what to do with all that extra space, so they just kinda default to making all images completely fullscreen, which means that posts end up looking completely ridiculous compared to how they appear on literally anything else. I deliberately never logged into Facebook on this phone, so I don't know what that looks like, but the (logged out) Instagram experience is that it just defaults to a 16x9 vertical ratio because they're at least smart enough to admit that the problem of making their app look good on this phone is beyond their capabilities. YouTube is really good, actually, and has a pretty unique view that puts comments over on the right side of the screen when the phone is in landscape mode and the video isn't fullscreen, but it's the only one that just natively looks that good.
of course, every single website on the internet (and by extension, cohost) looks great. since websites aren't designed with the exclusive assumption that they'll be approximately one palm of a hand in width at all times, they just look a lot better as a result. interestingly, a lot of cohost posts (in particular, the ones using CSS) look a lot better on my phone when it's unfolded; there have been a handful of times when I've been using just the outer display, saw a post that looked a little squashed, opened up my phone, and found that it now looked great. that's precisely the opposite experience I have with any app built around the assumption of a typical phone.
