Two packs. One common unit.
Compare weight, volume or item count.
Units and quantities
Enter the quantity in one pack. 1000 g = 1 kg; 1000 mL = 1 L. Item counts must be whole numbers. Compare within the same category; weight cannot be converted to volume.
Offers and prices
Enter one pack’s price including tax, before the offer. 2 for 1 gives two packs for one price; 3 for 2 gives three for two prices. One offer per option. If already reduced, choose No offer.
Discounts and rounding
The percentage applies to one pack. Round its total to currency precision before dividing; halfway rounds up. Correct a total below the smallest currency unit. Inputs are never rounded silently.
Unit price and checkout
A lower unit price may need more money at checkout. Both amounts are separate. An exact unit-price difference below 0.01 is practically equal, without a unit-price winner. Checkout costs can still differ.
Currency and input
Use one currency for both options and the local decimal separator, without thousands separators. Changing currency preserves text without conversion. JPY/VND totals have no decimals, but unit prices may have fractions. KWD totals have three decimals; the others have two.
What to consider
Consider quality, expiry and how much you will use. Shipping, memberships, coupons and additional taxes are not calculated. Manual comparison without scanning, accounts or automatic product history.
Calculations work offline. The app remembers your preferences and when to show app suggestions. Products and prices are not saved automatically.
Price per unit. Cost at checkout.