Match product and pack
A similar name does not mean the same product. Check brand, type, weight, or count, especially for tuna, detergent, and diapers.
- •Brand and type.
- •Size or count.
- •Drained weight when relevant.
Karnly methodology
How to compare product prices correctly
A good comparison prevents mixed products and packs. Check five signals: product, size, unit, store, and update time.
Why Karnly?
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Match the same product and pack size
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Review the price update time
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Compare the full basket
Turn price into value
When packs differ, use price per kilogram, litre, or piece and compare matching products rather than an isolated number.
Add availability and date
An old or unavailable price is not a real win. Review update time, store, branch, and offer conditions.
Frequently asked questions
What is the biggest comparison mistake?+
Comparing different packs or products and calling one cheaper without calculating unit price.
What if a product is unavailable?+
Show it as unavailable and find a matching alternative or store instead of treating it as the cheapest offer.
Is an old price useful?+
It can explain movement, but should not be presented as current or guaranteed for purchase.
Apply the method
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Start with one product or add your full shopping list.