Google Photos is pretty great though. My use case for it is that even though it's private, I assume that any photo on there could become public.
I have an iPhone but I don't use iCloud's backup or sync feature either, I just store my photos locally. I backup my iPhone to my iMac, and I backup my iMac to my Synology NAS in my closet. I try to keep my private data private.
Edit: I want Photos app to have this feature. Other apps can do it on iOS but they have to play location services shenanigans to get it to work in the background and I don't do that. The Photos app has special abilities.