Inviting someone sends them a link. They accept, and they're in — the hub's shared albums are there, with everything already in them. There's no setup for them to work through.
Who can invite#
Hub admins. If you created the hub, that's you; if you've added other admins, they can invite too. See Admins and members.
They don't need to install anything#
This matters more than it sounds, because "download another app" is where most family photo sharing quietly dies.
Keepr works in a browser on any phone or computer. Someone can accept an invitation, look at the photos, and keep using it that way indefinitely. The apps on Google Play and the App Store add convenience, but nothing requires them.
How many people#
Depends on the plan: the free Starter Hub holds three, and larger plans hold more. The current numbers are on the pricing page rather than here, because they change.
If you're at your limit and want to add someone, you can move the hub to a larger plan without disturbing anything in it.
If someone doesn't accept#
Their invitation shows as still waiting until they act on it. Hub invitations don't tell you whether the message was opened — only whether it's been accepted.
So if a few days pass, assume it went to a spam folder or a phone they never check rather than that they weren't interested. Sending it again through a channel they actually use — messaging them the link directly — is usually all it takes.
Removing someone later#
You can remove a member. They get 30 days to download or move what they added, and after that every photo and video they uploaded moves into their own Keepr storage. What other members uploaded stays in the hub.
The full picture, from both sides, is in Leaving or being removed from a hub.