Do you ever grab a calculator & the back of an envelope to work through an idea or problem that involves some math?
Cost / License
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Apps similar to RealCalc Scientific Calculator include SpeedCrunch, which is free and open source. Other options are Qalculate!, Fossify Calculator, OpenCalc and fxSolver. There's no shortage of Calculators like RealCalc Scientific Calculator, with more than 100 alternatives for Android, Windows, the web, iPhone and Mac.
Do you ever grab a calculator & the back of an envelope to work through an idea or problem that involves some math?




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A graphical scientific calculator that is easy to use and has some advanced functionality such as vector arithmetic and variable solving.




A kickass, open-source calculator that lets you do calculations and unit conversions naturally, with features like:
