Scientific Calculator: History

A scientific calculator you can correct. Tap anywhere in the expression, move the cursor, and fix the digit you got wrong — no clearing the line and starting again. EVERYDAY CALCULATOR The portrait keypad covers what most days need: the four operations, percentages, parentheses and a sign toggle. A running preview shows the answer as you type, so you can see where a long expression is heading before you press equals. SCIENTIFIC KEYPAD Turn the phone sideways for a full scientific pad across two pages — square root, cube root, absolute value, natural log and log base 10, sine, cosine and tangent with their inverses, the hyperbolic functions with theirs, powers, squares, cubes, factorial, e to the x, 2 to the x, reciprocal, pi and e — and a degrees/radians switch. HISTORY YOU CAN SEARCH Your recent calculations are kept on the device. Search them by expression or by result, swipe one away to delete it, tap one to bring its answer back to the display, or copy it straight to the clipboard. SEVEN TOOLS BUILT IN • Unit converter — length, weight, volume, area and temperature • Tip calculator — including splitting the bill • Discount and markup • Percentage change • BMI — metric or imperial • Date difference — years, months and days between two dates • GPA — weighted across your courses ABOUT THE ANSWERS The calculation engine is checked on every build against a second implementation of the same mathematics, written separately, across a million different expressions. That testing is our own rather than an outside audit — but it is the reason the digits on screen can be trusted all the way to the last one shown. MADE TO LIVE ON YOUR PHONE Light, dark or follow-the-system themes, six accent colors and a custom color picker. Optional haptic feedback on every key. No account and no sign-in, and the calculations themselves run entirely on your device without a network connection. The app is supported by ads. A single in-app purchase removes them for good.