I'm surprised retailers like Whole Foods haven't added something like this to purchases made in store tied to an Amazon account. At the point of sale they have

I'm surprised retailers like Whole Foods haven't added something like this to purchases made in store tied to an Amazon account. At the point of sale they have access to best-buy dates, etc (or could even add it during inventorying) and could use that data to alert you to restock with better granularity than sending a reminder based on your shopping trip frequency.