Some grocery apps already keep track of what you're buying daily. What if it informed you before you milk goes bad?
Things it could include:
-A list of everything you bought/have
-Reminder eggs are going to expire soon (or the broth you bought a year ago)
-Suggestions for recipes with the items you bought (which some grocery stores already have)
-Ability to keep track of things in your fridge (take them off of the list/delete from app)
I'm always constantly forgetting I have lettuce in the back of my fridge or can't remember when I bought my eggs. I get mad at myself for throwing things away (spending $3 on lettuce instead of coffee). I've often googled "How long are eggs good for?" And sometimes they're good even after the expiration date. Or even living by yourself can be it's own challenge. You might not use a half carton of eggs, and might need suggestions of quick things to cook.
This is a simple thing that can be adapted.