Small promo here but: the inability to make collaborative photo albums without some onerous signup/login/auth flow was one that that recently inspired me to make this really simple moodboard website:
When you got to the site (a SPA) it generates a new view/edit url for you. You can immediately drag photos onto the page to add to the gallery, remove them, etc. If you share the edit link with someone else, they can do all the same things. However if you share the link without the edit portion, the site is view only. The API is also public and just uses the edqit key query string for auth (check the network traffic), so I've been building a few apps on top of this as a sort of ad-hoc collaborative CDN thing.
I'm also working to build something similar to OP for my own grandparents and use mood.site as the image backend.
https://mood.site
When you got to the site (a SPA) it generates a new view/edit url for you. You can immediately drag photos onto the page to add to the gallery, remove them, etc. If you share the edit link with someone else, they can do all the same things. However if you share the link without the edit portion, the site is view only. The API is also public and just uses the edqit key query string for auth (check the network traffic), so I've been building a few apps on top of this as a sort of ad-hoc collaborative CDN thing.
I'm also working to build something similar to OP for my own grandparents and use mood.site as the image backend.