Use Callie for the everyday totals and checks that happen all day.
Scientific
Scientific calculator app for everyday math
Use Callie for quick arithmetic, then switch into Scientific mode when you need trigonometry, logarithms, exponents, roots, constants, and memory controls.
Basic mode handles everyday arithmetic. Scientific mode opens a dedicated landscape workspace for deeper checks, schoolwork, and multi-step calculations.
Why keep Callie installed
Why keep Callie installed
Callie earns its place by keeping everyday math, scientific checks, money tools, dates, unit conversion, percentages, and currency conversion together in one calm workspace.
Reach trig, logs, powers, roots, π, and e without switching apps.
Use MC, MR, M+, and M- for multi-step calculations.
Callie keeps scientific math close to money tools, conversions, percentages, and dates.
A few useful answers
Scientific Calculator FAQ
What scientific functions does Callie include?
Callie includes trigonometry, square root, square, reciprocal, logarithm, natural logarithm, exponents, π, e, percent, sign toggle, and memory controls.
Does Callie open as a scientific calculator?
Callie opens to the main calculator by default. You can switch between Basic and Scientific modes.
Why use Callie instead of a separate scientific calculator?
Callie keeps scientific tools beside everyday math, currency conversion, unit conversion, date tools, and money helpers in one app.
More Callie guides
Keep the next tool close.
Callie for iPhone & iPad
Download Callie for everyday math
Callie keeps calculator work, scientific mode, currency conversion, money tools, unit conversion, percentage math, and date tools together in one calm workspace.