Family Synchronized Shopping List

Why?

Avoid both buying the same items twice or not at all because of you either both went shopping (maybe even also one of the kids) or none of you did because you all thought the other one did.

How?

A smartphone app that everyone in the family who does shopping for everyday items installs. There is one shopping list with two views – a shared one with all the items, and your list of the items you chose to do the shopping for. Each person can add a new item to the shopping list, or mark an item in one of two ways:
1. I am going to buy this today
2. Purchased
So if you know that on your way home from work you are going to pick up milk and eggs, you mark them as “I’ll get this,” so others can see that it’s been taken care of and not plan on buying it too. When you bought the item, you mark it as “purchased.” You can also purchase an item someone else is going to if it’s not purchased yet, by “stealing it from them” and marking it as “I’ll get it.” In that case, the other person already planning on buying it will get an alert.