Calculator++

Calculator++ is a modern math tool that keeps everyday calculations, scientific functions, matrices, and currency conversion in one clean, responsive app. Built with Material Design, it focuses on speed, clarity, and accurate results—so you can solve classroom problems, engineering tasks, or daily math without switching apps.

What can you do?

Basic & scientific math in a single keypad

Trigonometry, logarithms, exponentials, powers, roots, factorials

Angle modes: Degrees (DEG) and Radians (RAD)

Parentheses & operator precedence for multi-step expressions

Matrices & linear systems: determinant, inverse, and solve Ax = b

Currency conversion with online exchange rates and a clear “last updated” time

Material Design UI that scales well on phones and tablets

Dark mode for comfortable use at night

Core & Scientific Calculator

Perform everyday arithmetic quickly and view expressions as you type, so you always know what's being calculated. When you need more, switch to scientific keys:

Powers (xʸ), roots (√, ⁿ√x), factorial (n!)

Natural and common logs (ln, log₁₀), exponentials (eˣ)

Trig and inverse trig (sin, cos, tan, asin, acos, atan)

Toggle DEG/RAD instantly to match your problem set
Careful precedence handling and clear error messages help you avoid surprises and catch input mistakes early.

Matrices & Linear Algebra

Work with matrices right inside the app—handy for homework checks, quick verifications, or field calculations:

Create matrices of common practical sizes

Compute determinant and inverse (when defined)

Solve linear systems (Ax = b) without extra tools
The interface guides you through each step so you can focus on the math, not the mechanics.

Currency Converter (Online Rates)

Convert between major world currencies with current rates fetched over the network. You'll see:

A clear timestamp showing when rates were last updated

A simple layout that emphasizes input amount, base currency, and result
Notes: Currency data is intended for general reference; please verify important financial decisions with official sources. The calculator and matrix tools work offline; network access is only used to refresh currency rates.

Designed for Vietnamese Users

The application interface is currently in Vietnamese for a familiar, straightforward experience. English UI may be considered in the future, but all core features already work seamlessly today.

Comfortable, Reliable, and Practical

Material Design for consistency and readability

Dark mode to reduce eye strain

Responsive layouts that adapt to your screen size

Thoughtful warnings when an operation is not defined (e.g., non-invertible matrix)

Privacy & Permissions

Calculator++ performs core calculations offline and does not require personal permissions such as contacts or location. Network access is used only to update currency exchange rates.

Whether you’re checking homework, verifying a matrix solution, or converting prices while planning a purchase, Calculator++ keeps powerful math tools in a single, clear app—built for speed, accuracy, and everyday practicality.