GoldRapid is a free Android app developed by RellikDev and falls under the category of Utilities and Tools. This app provides a quick way to calculate gold transactions with the ability to apply karat to define purity, and calculate the final price plus the pure weight. It offers two measurement scales, grams and tola, and you can easily change the live rates with a simple touch.

To use the app, you simply need to input the weight in grams, slide the rate and karat sliders to select the gold rate and karat to be applied on calculation. The app will then display the end calculation result, net weight, and total price at the bottom. You can also select default intervals from the application menus.

GoldRapid is an excellent app for people with little knowledge about gold calculations but still want to perform calculations. It displays percentage, purity in .999, and deduction per rati all on a single screen. It's also useful for gold retailers, wholesalers, and shopkeepers to quickly do their day-to-day calculations without the risk of mistyping and causing wrong billing amounts.

Overall, GoldRapid is a reliable and efficient tool for anyone looking to perform quick gold calculations with ease.