SimplyUs - Shared Calendar, ToDo Task List & Organizer for Couples by IronArk, Inc.
This app really helps keep my wife and I synced in regards to Shopping Lists, Honey-To-Do lists, and other tasks. We put our grocery list on here and when we go shopping we check it off as we go. The app works pretty well and keeps our Life Simple. :) Now updated to HUB. I will try it out and post about this later.