I'm sorry, i didn't explain it very well, i'll definitely fix that.
Basically the problem was, that we had a lot of groceries in large amounts while the ones we needed weren't there at all.
If we went shopping we mostly forgot to check what we already have and bought even more of the things we already had, forgetting the stuff we needed.
The Project therefore is a simple tool to scan your products and keep a list of the things you have (with the amount).
If you're on your way to the grocery store and you realise, that you don't really know if you need this or that product, you can simply VPN into your home network and check the stuff you have at home.