Buge Calculator

BUGE CALCULATOR

Buge Calculator is a powerful, privacy-first Android scientific calculator built with Kotlin, Jetpack Compose, and Material Design 3. It combines precise expression evaluation, interactive function graphing, 3D formula surfaces, safe local mathematical Python, multilingual support, and a refined adaptive interface.

FEATURES

Core Capabilities

- Scientific Evaluation: Parses and evaluates expressions with functions, powers, roots, factorials, and combinatorics - Interactive Function Graphing: Plots mathematical functions with pan, pinch-to-zoom, grid controls, and reset view - 3D Formula Surfaces: Renders z = f(x, y) surfaces with direct rotation, zooming, and camera reset - Privacy-First: No ads, no analytics, no account sign-in, and no cloud backend. Calculations stay on your device.

Scientific Calculator

- Switch between Basic and Scientific keypad modes - Evaluate arithmetic, brackets, powers, roots, percentages, and factorials - Use trigonometric, logarithmic, exponential, rounding, minimum, maximum, gcd, lcm, nPr, and nCr functions - Choose angle units: Degrees, Radians, or Gradians - Read responsive expression and result displays with clear validation errors - Review completed calculations in persistent local history

Function Graphing

- Plot expressions such as sin(x) and x^2 - 4 on an interactive canvas - Drag to pan and use pinch gestures to zoom around the graph - Show or hide the coordinate grid as needed - Reset the graph viewport at any time - Enter functions directly with an expression field and contextual guidance

3D Formula Models

- Build formula surfaces by entering z = f(x, y) expressions - Drag to rotate the model and pinch to zoom the camera - Explore rendered mathematical surfaces in a dedicated 3D Model workspace - Reset the camera to return to the default viewing angle - Keep the formula workspace separate from calculation history and graphing tools

Local Mathematical Python

- Built-in Python Workbench for local mathematical code - Runs safe mathematical Python code directly on the device - Imports, file access, and network access are disabled by design - Provides a focused code editor, help text, and clear execution feedback

Personalization

- Display Mode: Switch between compact Basic and expanded Scientific calculator layouts - Theme Mode: Light, Dark, and System-following appearance options - Color Source: Dynamic system colors, curated presets, or a custom seed color - Typography: Google Sans Flex supports clean, expressive displays and metadata - Interaction Settings: Select angle units and optionally enable haptic feedback

Interface Highlights

- Dedicated workspaces for Calculator, Graph, 3D Model, Python, History, and Settings - Rounded Material 3 controls with responsive layouts for different screen sizes - Local calculation history with an empty-state view and clear-history action - Adaptive typography powered by Google Sans Flex

PRIVACY

- No Tracking: No advertising SDKs, analytics, account sign-in, or cloud backend - Local Storage: Settings and calculation history are stored locally on your device - No Network Dependency: Core calculator, graphing, 3D modelling, and Python tools work offline - Python Sandbox: Imports, files, and network access are disabled for local Python code - Input Processing: Mathematical expressions are evaluated locally within the application

LICENSE

This project is licensed under the GNU General Public License v3.0.