Yes, i am aware that taking pictures of the screen is always possible. I was looking for a best effort solution, because blocking screenshots and sharing would definitely do most of the work. I don’t know why people immediately jump to DRM. It’s just an image viewing app that I’m looking for.

The social issue is, that my SIL already asked that none of her kids be posted to social media, but my BIL ignored that.

But since there doesn’t seem to be anything like that, I guess I’ll have to tell them that if they ignore it, they’re will be no more pictures

You seem to be a very judging person. I just hope you’re not projecting your own thoughts onto other people.

I have thought this through, and obviously there’s always ways around. But I know that my relatives are not tech savy enough, and taking a picture from another phone isn’t something i can control anyway.

But why am I explaining this to you? The only thing on your mind seems to be CSAM, which is very suspicous and weird.