Type an expression or tap the keys — it handles trig, logs, powers, roots, factorial, constants and parentheses, with memory keys and a running history. Your keyboard works too. Nothing leaves your device.

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Calculations use double-precision floating point, so very large factorials or long chains can carry tiny rounding differences — the same as any pocket calculator. Angle mode (DEG/RAD) applies to sin, cos, tan and their inverses. Everything runs on your device.