Email and a password, for parents who post. Family uses an invite plus a password. It works on a phone, a tablet, a computer — anything with a browser.
Share a unique link so your mom, your sister, everyone waiting knows where to go. The family password is still what opens it — the link alone never shows posts.
Your invite looks like this
/f/willow-day
Then a private circle screen: name, family password, come in.

Your photos and posts stay with your family — a quiet place to come back to these days. Not ads. Not a group text that gets buried.