MathLib · Formula Calculator
Calculate right away, keep useful steps as a personal formula, and change the inputs next time instead of rebuilding the math.
Write linked expressions, use named values, and explore 104 templates across 13 categories. Adjust numeric inputs and sliders, view results and plots, and find functions in the built-in reference.
The calculator, catalog, plotting, units, and reference are free. Save two personal formulas with Free, or unlock unlimited saves with the one-time MathLib Pro purchase. No subscription.
Built for iPhone with iOS 17 or later. Calculations work offline. No account, analytics, advertising, or cloud sync. Purchases and restoration require App Store access.
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