I use this app to share shopping lists across myself, my hubby and my three older kids. We all share the same login from each of our iPhones and can see what's on the list at any time and can each add our items. Typically I'm the shopper, but this also comes in handy when dear hubby or dear teen is out and about and I have a few items on my list I call them and say "Hey honey, can you swing by and get what's on the list?" I make the entire household enter their needs here as a requirement to ensure I get what they need. Makes everyone in the household responsible for updating the list! No more "hey, you forgot such and such". Nope, they either add their needs to the list or not!