GST Calculator-Smart app helps you to instant calculate GST Tax for Different Tax Slabs like 3%, 5%, 12%, 18% and 28% This is an easy to use GST Calculator, this is a useful GST Calculator app for all GST Rates, it has 5 predefined GST rate you can change the rates from Setting. ◆Features ●Add or Remove the GST from given amount with a touch Pre-provided GST Button like +3%, -3%, +5%, -5%, +12%, -12%, +18%, -18%, +28% and -28% ●You can also change GST rates as per your need. ●Basic Calcu