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CALCULATE Whether math and science, conversions, engineering, construction, finance, investing or real estate, we got you covered. Works on iPhone, iPad and Apple Watch (simple calculator and tip calculator on Apple Watch).Perform calculations in either decimal, scientific, engineering, fraction or feet-inch format with functions that include powers, logs, trig and more. Sometimes a number isn't enough. Visually seeing data in the form of a function graph, bar chart or scatter plot enhances understanding like a result never could.