[ Thanks to LinuxLinks.com for this link.
]
“One of the basic utilities supplied with any operating system
is a calculator. These are often simple utilities that are
perfectly adequate for basic use. However, the calculator supplied
with Android devices is exceptionally limited offering just the
basic addition, subtraction, multiplication and division functions
combined with parentheses. Even trigonometric functions,
logarithms, factorials, and a memory function are absent.“All of the calculators featured in this article are much more
sophisticated than the calculator supplied with Android devices.
Some of them have the functionality to plot graphs in 2D and 3D, as
well as the ability to process complicated mathematical functions.
With this software and an Android smartphone, you will always have
access to a proficient calculator wherever you are in the
world.”