Alternatives

SpeedCrunch

SpeedCrunch is a free, open source calculator app and website designed to provide users with a quick and easy way to perform mathematical calculations. It is designed to be easy to use and understand, with a simple user interface and clean, straightforward design. SpeedCrunch sup...

Very, very similar to opal. For less vigorous calculations the speed is better. For more complex calculations, opal, the full version is better with a slightly higher learning curve.

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Qalculate!

Qalculate! is a cross-platform, multi-purpose calculator application. It is designed to be powerful yet easy to use, and it is capable of performing many different types of calculations. It has a wide variety of features including algebraic, symbolic, numeric, and graphical calcu...

Very powerful but not too hard to get. Opal has a more modern user interface, but QualQ works well.

Guest

Soulver

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Numi

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Windows Calculator

Windows Calculator is a free educational and reference application from Microsoft that is part of the Windows operating system. It is a powerful calculator for performing basic math operations, such as addition, subtraction, multiplication, and division, as well as more advanced ...

galculator

Galculator is an open-source scientific calculator app (or website) designed to assist students, engineers, and scientists with their calculations. It performs basic arithmetic operations (add, subtract, multiply, and divide), complex functions (logarithms, exponentials, roots, e...

Frink

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Calculator plus1

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Calculator Plus

Calculator Plus is an advanced educational and reference calculator application. It features a wide range of powerful mathematical tools and features that help students and professionals alike to solve complex calculations. This app provides users with the ability to easily perfo...

Notepad Calculator

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CCCalc

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SimpleCalc

SimpleCalc is a free educational and reference application that helps users quickly and easily perform basic math calculations. It includes intuitive, easy-to-use features and an intuitive user interface that make it simple for anyone to get started. It offers basic mathematical ...

Omni Calculator

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Ruvenss Calculator

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Numeric Notes

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InstaCalc

InstaCalc is an education and reference application designed to help users quickly and easily solve complex equations and calculations. The app allows users to input equations and carry out calculations using a variety of functions such as basic arithmetic, trigonometry, algebra,...

GlassCalc

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Wakari

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CalcNote

CalcNote is an educational and reference application designed to help students learn and understand mathematics. The app features step-by-step video tutorials on algebra, calculus, trigonometry and other mathematics topics. It also includes an interactive calculator with a compre...

OpalCalc Comments

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OpalCalc Reviews

By jeanhsu · Oct 2016

Una calculadora realmente agradable porque puede agregar fácilmente funciones personalizadas para adaptarse a su estilo y su trabajo. En mi caso, como desarrollador web, una función para calcular fácilmente el ancho de un elemento en una página web. Además, la combinación entre texto y números es impresionante porque es más fácil dar sentido a lo que acabas de hacer. Por ejemplo para algunos gastos en efectivo. Tener la etiqueta además del número realmente ayuda. Conversión y calculo (golosinas) del tiempo y la tasa de efectivo. Wow, ¿cuántas veces verifiqué USD a dólares CAD antes de comprar en línea?

OpalCalc

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