Quickly determine the fair value of your gold, silver and gold-filled jewelry. App downloads the current market value of gold and silver. Enter the weight (grams, ounces, pennyweight) and Karats (or purity for silver) and the app immediately calculates how much it is worth. You can even determine the fair buy and sell price by entering how much more or less you want to pay from the fair market value. Quickly determine if you want to buy or sell at the store or flea market before anyone else!