Royal Joker

Royal Joker is a utility app where the BMI calculator is designed to be as frictionless as possible: enter two numbers, get a complete result, no complicated menus, no unit conversion required, no waiting.

The two inputs are all it takes: your height and your weight, in whichever unit system you prefer, metric (cm and kg) or imperial (ft/in and lbs), and Royal Joker immediately returns your BMI value with its labeled category.

The history log saves every measurement automatically: each time you check your BMI, the result is added to the log with its date, building a timeline of your measurements without any manual record-keeping on your part.

The randomizer offers a completely different kind of tool in the same app: flip a coin, roll dice from D4 to D20, generate a number in a range, shuffle a list, pick a random color, or decide between custom options, six modes, one screen.

Royal Joker is completely offline and needs no account, the BMI calculator and all nine other tools are available immediately from the first launch.