A Calculator for Rational Numbers
RCalcs dual numeric keypads enable you to enter rational numbers effortlessly.
You can add, subtract, multiply, divide, and even factorise rational numbers.
You can also explore the prime factors of numbers with prime factors not exceeding a certain (large) limit.
You can save your calculations as programs and open them later.
Its zoomable output display allows you to magnify its contents for easy viewing experience.
RCalc does not need any any internet connection.