I paid a whopping $1.99 for the pro version, which allows me to sync everything with the web based version and I can easily text or email lists to my husband or anyone else if I need to and we can share lists.
On my phone, I have a shopping list, a pantry list, and a to-do list and each one allows you to make multiple lists. There is a bar code scan button at the top of each list so you can just scan in the item and you can edit price and quantity to see how much your total shopping list costs. The pantry list lets you keep up with things like the bazillion bottles of spices and herbs on the shelf back home so you can remember what you have. I am still exploring all the options, but I love it so far!! No more paper lists.