It is a convenient app that allows you to easily calculate the discounted amount from the amount and the percentage of the discount. You can easily check the price after X percent discount. Consumption tax can be calculated with or without tax, and the tax rate can also be changed. If tax is not included, the discounted amount plus tax and the amount of tax will also be displayed. You can also save the discount results and check them later, which is convenient for shopping. By saving multiple results, you can also check the total amount.