Calculator

Cassie devs

About this app

A little clarity, every day.

Calculator brings everyday arithmetic and useful scientific tools together in a calm, thoughtfully designed workspace. Warm ivory surfaces, deep green text and copper accents keep your numbers easy to read and your next calculation close at hand.

EVERYDAY CALCULATIONS
Add, subtract, multiply and divide. Use parentheses to group your work, calculate powers, work with decimals and convert percentages. Standard operator precedence keeps expressions predictable. The percentage key divides its preceding value by 100: for example, 200 × 15% = 30.

SCIENTIFIC TOOLS WHEN YOU NEED THEM
Open the scientific panel for sine, cosine, tangent, square root, base-10 logarithm, natural logarithm and pi. Switch between degrees and radians to match your calculation.

KEEP YOUR RECENT WORK
Your last 50 completed calculations stay on your device. Open History to review an expression or tap an entry to reuse it. Clear the history whenever you choose. Your current expression, result and angle mode are saved between sessions.

SMALL DETAILS THAT HELP
Copy a result, delete the last character, change the sign of an expression or start fresh with All Clear. Scroll long expressions and results. The interface also scrolls on smaller screens and in landscape.

PRIVATE AND READY OFFLINE
No ads, accounts, subscriptions or internet connection required. Calculator requests no Android permissions and includes no analytics or advertising libraries. Calculation history is stored locally on your device.

Calculator uses approximate numerical calculations, displaying up to 12 significant digits. It is designed for everyday and general scientific work; it does not offer symbolic algebra or arbitrary-precision arithmetic.