The group

A group is the people you shop with: the same list, the same favourites, the same shops.

1. Open Group and invite whoever shops with you.
2. Whoever accepts joins the group: from then on you share the list, the favourites and the shops.
3. Whatever one of you adds or ticks reaches the other devices within seconds.

When you join a group, your list and favourites are merged into the group's.

Questions

What does the group see about me?

The shared list and favourites, the name you choose, and your allergies and meal plan if you add them. The detail is in Your data.