HoundSonar

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Costco price adjustments

Stop keeping receipts on the counter for 30 days.

Costco refunds the difference when something you bought goes on sale within 30 days. Catching it means remembering, digging out the receipt, and checking. HoundSonar keeps track for you.

Start free How it works $14.99 a year
The old way

No shoebox. No calendar reminder. No searching.

The policy has always been good. Keeping up with it by hand is the part that fails — a receipt that has to survive a month on the counter, and a price you would have to go back and look up.

COSTCO WHOLESALE Warehouse #1042 1500 Commerce Parkway Riverton, CA 92000 SJ Member 1119 **** 4402 *****Bottom of Basket***** 1891711 OLIVE OIL21.99A 4022018 BLENDER129.99A 1746329 TIDE OXI24.49 9930014 PAPER TWL22.99 3381902 COFFEE 3LB18.99 7712045 SALMON31.24E 2204418 BATTERIES19.99 5590231 CHKN BRST28.44E ********BOB Count 8******** SUBTOTAL 246.13 TAX 19.08 **** TOTAL 265.21 - - - - - - - - - - - - - XXXXXXXXXXXX4402 CHIP Read AID: A0000000000000 Costco Visa Resp: APPROVED - - - - - - - - - - - - - TOTAL ITEMS SOLD - 8 INSTANT SAVINGS $ 10.00 1042000719200084610000 Thank You! Please Come Again Whse:1042 Trm:07 Trn:0192 Items Sold: 8 8
Circle it and hope Keep the paper somewhere you will find it, remember roughly when the window closes, and check the price yourself before it does.
Or photograph it once Every line is watched until its window closes. When a price drops you get the item, the amount and the date you have to ask by.
How it works

Three things. Then you're done.

The point is not another app to open. You photograph a receipt, and the next time you hear from us there is money to collect — on a sheet you can hold up at the desk.

01

Photograph the receipt

Whole thing in frame, on a table. Every line, the item numbers, the totals and what you already saved at the till.

02

We watch for 30 days

Every offer in the current book, checked against every line still inside its window, every night. It is all here if you ever want to look — but you never have to.

03

You collect it

Everything from one receipt on one sheet, with a total. Hold it up at the membership desk and they refund the difference.

The half that matters

It checks its own arithmetic.

Reading a receipt from a photo is the easy half. Knowing whether the read was right is the half that decides whether you walk up to the membership desk with a number that holds up.

A till receipt already proves itself — the totals it prints have to agree with the lines above them. So we check the read against the receipt's own numbers before it ever becomes a claim.

When they don't agree, we say so instead of quietly showing you a number. An app that is confidently wrong at the desk is worse than one that asks for a better photo.

32 lines1,204.87
Instant savings−86.50
Subtotal1,118.37
Tax61.51
Total1,179.88
All four checks tie · 32 of 32 lines read
Price

One receipt usually pays for the year.

Six receipts free, watched for their full 30 days, so you find out whether there is anything in your receipts before you pay for anything. Nothing to cancel if there isn't.

After that it is $14.99 for the year — usually less than the first adjustment it finds you. One price, and no upsell at the moment it has something to tell you.

$14.99
per year · six free to start
  • Every line watched for its full 30 days
  • Each new savings book checked against every open window, nightly
  • A claim sheet with the item, the amount and the date to ask by
  • Export or delete everything, any time
Start free
Questions

The ones worth asking first.

Trust & privacy
Do you need my Costco login?

No. You photograph the paper receipt — that's how scanning works today. We don't ask for your Costco login to read a receipt, and can't see your purchase history or your card.

What do you do with my receipts?

Read them once, then watch what you bought against each new savings book for 30 days. They are not sold, not shared with advertisers, and not used to build a profile of you. Export or delete everything whenever you want.

Do my receipts help other members?

Yes — but only as prices. When a receipt shows an item was discounted at the register, that is a fact about a price, not about you, so it goes into an aggregate that carries no account, no warehouse and no date of any trip: only the item, the amount, and how many people saw it. Nothing surfaces until several separate members have seen the same discount, and it is never presented as money you are owed.

Are you affiliated with Costco?

No. HoundSonar is published by Drupefruit LLC and has no relationship with Costco Wholesale Corporation.

How it works
What if the price drops on day 31?

Costco’s window is 30 days from the purchase date. We stop watching when it closes, and every claim shows the day you have to ask by.

Does this work for costco.com orders?

Not yet. Today it reads the paper receipt from a warehouse trip.

What happens if the desk says no?

Price adjustments are granted at Costco’s discretion under its own policy. We tell you what to ask for and by when; we cannot guarantee the outcome at the counter.

Pricing
What exactly is free?

Six receipts, once — not six a year. Each one is watched for its full 30 days like any other receipt, and no card is required to start. After those six, it's $14.99 for the year.

Can I share this with my family?

Yes — once you have a paid subscription, invite up to two other people into your household from Account settings. Everyone sees the same receipts and claims, so it doesn’t matter whose phone did the scanning.