Albums in a hub come in two kinds, and the difference is simply who can see them.
Shared albums#
The default. Every member of the hub can see a shared album and add to it. This is where the family's photos go — the holidays, the birthdays, the ordinary weekends.
Private albums#
An album that's private to you. It sits in the hub and uses the hub's shared storage like any other album, but nobody else in the hub can see it — including admins.
Any member can create one. Not just whoever set the hub up, not just admins. If you've joined someone else's hub, you still get a corner of it that's yours.
That's worth knowing before you join a family hub, because the obvious worry — "does this mean my in-laws can see everything on my phone?" — has a straightforward answer: no, and you don't have to leave the hub or pay for separate storage to keep something to yourself.
Hiding a photo is a different thing#
Keepr also lets you hide an individual photo from particular circles. That controls who outside the hub sees it.
Inside a shared hub album it doesn't apply: hub members see the album's photos. A hub is a household — the point of sharing storage is that you reach the same archive — so hiding narrows the outside audience, not the inside one.
If you want something other hub members can't see, the answer is a private album, not a hidden photo. These two get confused, and the consequence of confusing them is assuming something is hidden from your family when it isn't.
Changing your mind#
An album can be switched between shared and private later by whoever created it. Making a shared album private removes it from the other members' view; making a private album shared adds it to theirs.
Either way the photos, and the storage they use, stay in the hub.