Our discount or surcharge application is designed to make your account easier when calculating the percentage discount or surcharge for a product or service. The application is very useful in many real life situations like: - On discounted purchases, so you don't have to wait until you get to the cashier to find out how much you will pay, you can now calculate quickly on your mobile. - On tips, or fees, so you can know if they are charging you the correct amount. - In stores, you who are a s