Ah, I see where I went wrong in the set-up. I selected myself /child under 16 which means only I can see usage. I think that needs reviewing so that they can keep a track. If I'd have selected a friend or family member, then it would have worked.
Yes that makes sense, the issue is it's for my son. I set it up by adding a new sim to a new group. He therefore doesn't have a login and I can't see where to create one for him.
Yes, I can see that, but like the original post, I want my group member to use the app and monitor their own usage. I can't find anywhere where they register as a user and link it to their sim.