Dealbreaker

Dealbreaker helps you beat shrinkflation by letting you compare deals effectively, factoring in units like grams, kilograms, pounds, oz, milliliters, liters, and gallons. It also considers multipacks, currency exchange rates, discounts, and shipping costs to show you the best of the deals you enter.

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The Dutch consumer organisation (Consumentenbond)

User Stories

The Coffee Conundrum

I’m hooked on a specific coffee I can only find online or at a Danish supermarket where I get 10% off with my discount card. Lately, the brand switched their 500g packs to 400g ones. Then the supermarket dangled a special deal on the old 500g packs, probably to clear them out and nudge us toward paying the same for less later. That deal sold out quickly. Online, at Scandinavian products I can still grab multiple 500g packs, and if I hit their 50€ free shipping mark, it might be worth it. But who can figure out the price per kilo for four 500g packs with no shipping versus a 400g pack that’s now 30DKK pricier than the old 500g used to be? Not me, not without some serious mental gymnastics. Dealbreaker crunches those numbers fast, showing me what’s actually the better buy per kilo, in euro.


Norwegian chocolate

  • Norwegian: Ja, vi elsker sjokolade
  • Swedish: Du gamla du Freia
  • Danish: ... og det er Freias salg

You are in Bodø airport and see 1 pack of 220g Freia chocolate for 49kr. Discount is 4 for the price of 3.
You have the Coop app and find in a Coop Mega, 2 packs of 220g Freia chocolate for 79kr.
You fire up Dealbreaker. This version of Dealbreaker does not yet do 4-for-the-price-of-3 discount, so you have to do the math to get 25%. Enter 49 in the price field (you can change the currency to kr or ignore the € sign). Then enter 25 in the discount field.
For the other deal you enter 2 in quantity and 79 in price.
Result: 36.75 in the airport and 39.50 at Coop.
It would have been even trickier to do in your head if the pieces had different weights.
I will update my app with the X-for-the-price-of-Y function asap.


Laundry Liquid Hunt


My go-to laundry liquid comes in these big bottles, but the store near me started selling smaller ones at a “discount.” I wasn’t buying it — literally. I couldn’t tell if it was a rip‑off or not. Dealbreaker broke it down—price per liter, shipping and discount factored in—and showed me the online deal was cheaper. Saved me from overpaying for less soap.


Visual examples

Washing Liquid
Information found on deal page Folder Shop A Folder Shop B
Number of Bottles34
Volume per Bottle990ml
Total Volume5580ml
Washes per Bottle22 washes31 washes
Price€19.99€38.38

Dealbreaker Results show you can choose based on convenience – it's down to 1¢ per wash or 15¢ per liter

Using pcs/washesUsing ml/ltr
Using the pcs method Using the ml/ltr method

Organic Instant Coffee
Information Given Website 1 Website 2
Number of Bags11
Volume per Bag150g150g
Multipack6
Total Volume150g
Price€9.99547.13kr
Free Shipping FromFrom €59From 1000kr

Dealbreaker Results

With Shipping CostsAvoiding Shipping Costs
With shipping Without shipping