Qalculate – Best desktop calculator app

Qalculate is a free open source cross-platform desktop calculator app for Linux, Windows and Mac OS. This is best alternative app for your default desktop app. It comes with advanced powerful features with simple userinterface. It uses Gnuplot to plot functions or data and it has the ability to save plot to PNG image, postscript, etc. It supports many physical constants and elements, CSV file import and export, SI units and prefixes, automatic unit conversion,Factorization, simplification, Differentiation and integration.

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