One shelf tag is amnesia
Failure: the rising familiar bag
Same 12oz coffee, $12.99 last month, $14.99 now. The shelf tag looks normal because you stopped reading ounces. Memory kept the brand. It dropped the price.
Failure: shrinkflation fog
Same label, less product, same vibe in the cart. You feel vaguely cheated without proof you can act on. Unit-price history is the proof.
Failure: bulk theater
Bigger feels cheaper. Sometimes it is. Sometimes the mid-size wins and the giant pack only wins at filling your trunk. One glance at today's tag will not settle it.
You need a timeline of what you actually paid for the sizes you actually buy.
Reading the timeline
As receipts land in Basket, each repurchase builds a price history for that item: paid prices and unit prices across dates, sizes, and stores, drawn from your lines, not a national average.
Signals worth acting on
- Rising paid price on the same size: time to swap or change stores
- Flat sticker with fewer ounces: shrinkflation in dollars
- Bulk size that loses to the mid-size you finish
- A store that wins this item even when another store wins the rest of the basket
- A "sale" that still loses on unit price to the everyday pack
Sunday move: pick one staple that hurt, open its history, choose the pack size for this week, add it to the list. Ten seconds. Weeks of evidence.
When coffee rises, swaps get more valuable. Dollar savings are measured against the last price you paid, not a fantasy MSRP. History plus store choice turns vague loyalty into item-level clarity.
