Group trips and shared events usually start with good intentions and end with a long text thread: who is bringing ice, who already bought trash bags, what still needs to come from the warehouse store. A static doc goes stale the moment people start driving. A group event supply list only works when it updates live.
CartTogether is a group shopping cart with live sync. Everyone joins the same cart with an invite link or code. As people remember propane, sunscreen, or extra snacks, the list updates for the person already in the aisle. That is how to share a shopping cart in real time for a cabin weekend, picnic, or party setup.
In the store, CartTogether shows the shared list as swipeable cards so the shopper can move item by item while the rest of the group keeps contributing. Mix iPhone and Android. Reuse a trip template next time so you are not rebuilding the same supply list from scratch.
If your crew needs a group shopping cart live sync for the next event, create a cart in CartTogether, invite up to two other people, and keep one supply list that stays current from planning through checkout.