In my experience, you can definitely do this by sharing a login, but it is not always 100% smooth. Over the years, Ive tried doing this for our annual block parties, and honestly, the Walmart app is decent but it isnt perfect for live editing. If you both log into the same account, you can see changes, but it doesnt always refresh instantly. Ive definitely ended up with double the amount of charcoal because my wife and I were both clicking at the same time... kinda annoying when you are trying to stay on budget. One thing Ive found that makes it way smoother is using a walmart cart share extension because it handles the sync part better. Usually, one of us adds stuff and the other just refreshes to make sure we arent overlapping. It saves so much headache when youre trying to coordinate.