Tap to add items, tap when items run out in the house, and tap as you buy items in the supermarket.
The grocery list is shared and synchronized to everyone in the house so we all know what ran out. Alternatively, you can send the list via SMS, WhatsApp, Viber, or even email to someone so they can buy stuff on their way back.
With this app we have focused on making one thing very well, a grocery list. So enjoyable this app is the last grocery list app you'll ever need.