The 4 Best Price Comparison Apps in 2026

By looking at the price history, not the crossed-out price. Keepa for Amazon and idealo for everything else show months of price movement, and there you can see straight away whether the product cost the same three weeks ago. Spanish law has for some years required shops to display the lowest price of the last thirty days when advertising a discount, but not every retailer applies it rigorously.

It depends on the product. Electronics and appliances usually see real discounts, although many are the usual price with an inflated crossed-out figure. Keepa's history shows that plenty of products are cheaper on random dates in October or January. Setting a price alert on idealo or Keepa works better than waiting for a specific date.

No, they are free and add no cost. They make money from affiliate commission paid by the shops or from advertising, just like cashback apps. You buy from the shop at the same price you would pay going direct; the only difference is that the comparison site receives a commission.

Chollometro and Tiendeo are the most focused on Spain, including physical shops. idealo has good Spanish coverage although it is German in origin and does not include every national retailer. Keepa only covers Amazon, but across all its European domains.