I have used Big Oven forever and I love the aspect of sharing the grocery list with my husband, looking up recipes and clicking “add ingredients to grocery list”, searches in categories like “slow cooker” etc, and searching for recipes based on the ingredients I already have.
The problem is the unreliability. Things will be marked off the list and we have to refresh and they will pop back on, or it will refresh on one person’s app but not the others.