It's a pretty cool spreadsheet... if you like the 'old fashioned way', LOL. No disrespect to the author's efforts, its a very good tool... I would only suggest to anyone into RV camping or Cruising that many Aps out there for tablets and phones that do a good a great job of meal planning and then generate shopping lists while also keeping inventory of stores on hand. I don't have any one in particular I would recommend since I haven't played with any for a few years.
Back when I got my first generation iPad I had checked out many Aps, always looking for useful tools that would make my iPad into something more useful than high-tech toy. Alas, I never really got into the regular habit of using my tablet on a regular basis. My iPad has been retired to my Sister's kitchen cook-book stand where she uses it to watch numerous videos on advanced cake decorating tips and the like. I'll get a new tablet sometime in the future when I want to run Navonics and other boat related Aps.