I feel like there is an opportunity for an app here that lets you input what you buy and see how the price has increased compared to the competition. There seems to be a lack of automated price comparisons here. I guess people can compare prices when shopping in store but if all companies raise their prices, I'd imagine some people would just stop buying if they knew about the price collusion more easily. I thought a cool app for the Apple AR goggles is to allow you to overlay the inflation increase of prices as you walk through a grocery store.
I was thinking about something similar for a personal meal plan app.
I want the ability to keep a list of recipes, and when I chose meals for a day/week, have the app take the ingredients list and scrape price sources (supermarket websites, etc.) and then give guidance on exactly where I should purchase each ingredient I need. Then simply track the scraped prices over time for the nominal inflation that you've mentioned.
As an addition to your excellent idea: recommend recipes with ingredients that haven't inflated as much as others.
I read somewhere that this summer strawberries have inflated a lot less in price compared to other fruits. It then led me to having this conspiracy theory that this is why I saw nonstop promotions for strawberry related products/promotions this summer.
