Know the real price before the till
"40% off" is easy to advertise and easy to mis-add in your head. Enter the original price and the discount and this calculator shows the exact amount you save and the price you actually pay, so there is no surprise at checkout.
Instant, and private
The result updates as you type, which makes it quick to compare two offers or check whether a bundle is really the better deal. It runs on your device, so nothing you enter is sent anywhere.