The app calculates the fine weight of gold using the density method. It will give you the percentage and the fine weight. You can also calculate how much you can get if you decide to sell or buy the gold. A converter is included. It allows you to convert the weight of gold from grams to ounces and from ounces to grams.
You need a scale a beaker a string and the gold. The app will also take you through the steps of getting these final values. It is so easy to use.