Random Number Generator Plus is a free and ad-free app that generates random numbers in various ways. The app has a simple and beautiful interface, and it does not require any permissions. It also has a dark mode that can be turned on or off at any time from the app's settings menu. The app adheres to Google's Material Design standards, and it is open-source.

The default random number generator allows users to customize the amount of numbers they want and the range they want them to be from. Users can also exclude specific numbers, sort the results by ascending or descending order, show the sum of the generated numbers, and copy the generated numbers report to their clipboard for easy sharing and transferring. The app also has a dice-rolling mode where users can roll as many dice as they want with whatever amount of sides they want. The app provides "quick options" for common amounts of dice sides and dice amounts so users can quickly roll dice for popular games like Dungeons & Dragons.

Random Number Generator Plus also has a lottery simulator that generates 5 random lottery tickets/results with the click of a button. Users can choose from simulating the Powerball or Mega Millions. The app also has a coin flipper that can quickly settle a 50/50 bet. Users can flip as many coins as they want whenever they want. The app also saves their preferred number of coins to flip for quick reuse and sums up the # of heads flipped and the # of tails flipped for them in the results box as well.

If there are any bugs or additional features users would like, they can let the developer know in their review. The app is open-source, and users can help make it better by contributing to its development.

In conclusion, Random Number Generator Plus is a versatile app that can generate random numbers, roll dice, simulate lotteries, and flip coins. It has a sleek UI, a dark mode, and it adheres to Google's Material Design standards. The app is free, ad-free, and open-source, and users can contribute to its development.