Downloaded and looks cool, but I will probably pare down the lists considerably for our situation.
For things we need for the camper, we use an application called OurGroceries for Android. Kind of like PP's paper lists, but remembers items previously put on the list for quick input. It keeps multiple lists, so we have one for Groceries, one for Costco, one for Camper, one for Christmas Gifts etc. DW and I currently have 13 active lists. The lists sync between phones, so we can divide and conquer while shopping and know exactly what the other person has already picked up. Or on Saturdays if DW is home cooking she pops an item on the list while I'm out doing errands and I can pick it up. Kind of freaky when you are in the store and items are magically appearing on your list before your eyes...
One other cool feature is the Recipes feature. We don't use it for recipes, but I have a recipe for "US Trips" for instance with items I often buy on trips South of the border. One tap transfers the items to our "Buy in the US" list; serves as a reminder of things to check before we head down.
2011 Jayco X19H (purchased 2015)
2008 Jayco 1007 PUP (purchased new, traded for the X19)
2012 Chev Traverse LT with TP