@fm_volker Hey, that sounds really awesome! Wow! :D
So, my thought are that it's mostly for people to very easily stay in touch with their elderly parents, by sending photos from their lives and of grandchildren etc. So it needs to work remotely, yes, and any number of people should be able to add photos. As to deleting, I don't think anyone will actually go trough manually and do that, so my initial thought is that that should happen automatically based on time + number of available pictures?