Thanks. Just checked the EXIF data. Those were JPGs (not even RAW DNGs) taken with the native app. I've tried some other camera apps over the years, and always come back to the default camera.app; the only other one I use sometimes is Lightroom's built-in camera app and that one only to capture RAW DNGs. That said, I did process these images in Lr afterwards.
PS: shameless plug for my photography website, which really needs an update,
www.AManWithACamera.com
I'm not a pro, just a on again/off again -- time-permitting -- hobbyist.