Random Number Calculator is a free app developed by GK Apps for Android users. The app generates random numbers between 1 and the maximum number set by the user. It is a useful tool for gamers who need to roll a dice or flip a coin for various games like backgammon, monopoly, craps, hazard, and more. The app also has applications in statistical sampling, computer simulation, cryptography, and completely randomized design.

The app's interface is simple and easy to navigate. Users can set the maximum number from a slider and click on the "Generate" button to get a random number. There is also an option to simulate coin flipping by setting the maximum number to 2. Overall, Random Number Calculator is a handy app for anyone who needs a quick and easy way to generate random numbers.