A weekly planner built around batch cooking. Cook a big pot, keep a tally of what's in the fridge and freezer, and drop portions onto lunches and dinners.
Free. Works on your phone, even offline.
Cooking and eating are separate, so a Sunday batch can feed the whole week and the freezer.
Pick a recipe and say how many portions you're making this time. They go straight into the store.
See every portion in the fridge and freezer. Move a few to the freezer, or all of them in one tap.
Drop portions onto lunches and dinners. Two by default, three when a friend comes round.
Every portion stays linked to the day it was cooked, so the oldest gets eaten first.
Mark what you keep in stock as running low or out, and your shopping list writes itself from the week's cooking.