RSK World - Android Calculator | Native Android Calculator App | Java Android SDK | RSK World

Java Android Scientific Converter Mobile App

This comprehensive Android Calculator provides basic arithmetic, scientific functions, unit converter, currency/tip/loan/BMI/age/percentage calculators, simple graphing, and settings. Built with Java and Android SDK using Material Design 3. Perfect for learning Android development, Java mobile programming, and calculator app design from basic to advanced levels.

If you find this Android Calculator useful, you can support with a small contribution.

Secure Fast Trusted

Pay via UPI QR

Scan or tap an amount to auto-generate

₹

Open UPI app

GPay PhonePe Paytm

Download Android Calculator

Project Overview

A native Android calculator application built with Java and Android SDK. Features basic arithmetic, scientific calculator, unit converter, currency/tip/loan/BMI/age/percentage calculators, simple graphing, settings, and Unity Ads integration. Material Design 3 with light/dark themes.

Main Calculator - Basic arithmetic (+, −, ×, ÷), percentage, memory (MC, MR, M+, M−)
Scientific Calculator - Trig, inverse trig, sinh/cosh/tanh, log, ln, exp, sqrt, cbrt, power
Unit Converter - Length, weight, temperature, volume, area, speed, energy, pressure, power, time
Currency Converter - Predefined exchange rates with from/to conversion
Tip Calculator - Bill amount, tip %, split by people
Loan Calculator - EMI, total interest, total payment
BMI Calculator - Height/weight in multiple units with category
Age Calculator - Birth date to age in years, months, days
Percentage Calculator - % of, increase by %, decrease by %
Simple Graphing - Math function graphing
Settings - Theme (light/dark), haptic, decimal places, history limit, angle mode (DEG/RAD)
Unity Ads - Banner, interstitial (every 5 calculations), rewarded
Material Design 3 - Modern UI with light/dark theme support
History - Calculation history with copy on tap
Professional Code - Clean, well-documented Android architecture

Project Structure & Files

Well-organized Android Calculator project with Java, Android SDK integration, Material Design 3, and professional mobile application architecture.

MainActivity.java - Main calculator with memory, history, shortcuts
CalculatorApp.java - Application class with theme and Unity Ads init
CalculatorUtils.java - Unit conversions, scientific functions, math utilities
AppPreferences.java - Theme, haptic, decimals, history limit, angle mode
AdManager.java - Unity Ads (interstitial, rewarded, banner)
ScientificCalculatorActivity.java - Scientific functions
UnitConverterActivity.java - Unit conversion (all categories)
SimpleGraphingActivity.java - Function graphing
SettingsActivity.java - App settings
CurrencyConverterActivity.java - Currency conversion
TipCalculatorActivity.java - Tip and split calculator
LoanCalculatorActivity.java - EMI calculator
BMICalculatorActivity.java - BMI calculator
AgeCalculatorActivity.java - Age from birth date
PercentageCalculatorActivity.java - Percentage operations
README.md - Comprehensive documentation and setup guide

Advanced Features

Complete Android calculator system with scientific functions, unit conversions, multiple calculator tools, and professional Java Android development practices.

Scientific Calculator - Trig, inverse trig, sinh/cosh/tanh, log/ln/log2, exp/exp10/exp2
Unit Converter - 10 categories: length, weight, temperature, volume, area, speed, energy, pressure, power, time
CalculatorUtils - arcsin, arccos, arctan, sqrt, cbrt, power, factorial, gcd, lcm
AppPreferences - Theme (system/light/dark), haptic feedback, decimal places (2-10)
History Limit - Configurable 20-100 entries
Angle Mode - Degrees or Radians for scientific calculator
Unity Ads Integration - Banner, interstitial (every 5 calculations), rewarded
Banner Fallback - 320×50 → 320×90 → 300×250 on no fill
AdManager - Load state tracking for SDK 4.x compatibility
Material Design 3 - Modern Material You components
Responsive Layout - Works on various screen sizes
Professional Code - Industry-standard Java practices
Educational Architecture - Perfect for learning Android development
Performance Optimized - Efficient calculation and UI updates
Extensible Design - Easy to add new calculators and features

Calculator Features

Comprehensive Android calculator with basic arithmetic, scientific functions, unit converter, and modern Java Android development practices.

Main Calculator - +, −, ×, ÷, %, decimal, +/- toggle
Memory - MC, MR, M+, M− functions
History - List dialog, clear all, copy on tap
Scientific - sin, cos, tan, arcsin, arccos, arctan, sinh, cosh, tanh
Logarithms - log10, ln, log2, exp, exp10, exp2
Roots - sqrt, cbrt, power (x^y)
Unit Converter - 10 categories with real-time conversion
Currency/Tip/Loan/BMI/Age/Percentage - Specialized calculators
Simple Graphing - Math function plotting
Theme Support - System/light/dark themes
Haptic Feedback - Configurable tactile feedback
Display - Expression and result, long-press to copy
Android SDK 36 - Target latest Android
Professional GUI - Clean, modern Material Design 3
Educational Design - Perfect for learning Android development

Technologies & Platforms

Built with Java 11 and Android SDK for native mobile application development. Production-ready with Material Design 3 and Unity Ads integration.

Java 11 - Modern Java with clean syntax and latest features
Android SDK - Min 24, Target/Compile SDK 36
Material Design 3 - Professional Material You components
AndroidX - Core, AppCompat, Lifecycle libraries
ConstraintLayout - Responsive layout design
Gradle AGP 9.0.0 - Modern build system
Unity Ads 4.12.1 - Banner, interstitial, rewarded ads
SharedPreferences - App preferences and theme storage
Modern Architecture - Activity-per-screen design
CalculatorUtils - Shared math and conversion logic
Cross-Platform - Android phones and tablets
Professional Package - Complete Android project structure
Educational Focus - Perfect for learning Android development
Industry Standards - Following Android development best practices
Extensible Design - Easy to add new calculator features

What You Get

Complete Android Calculator package with basic calculator, scientific functions, unit converter, multiple calculators, and professional Java Android development architecture.

Complete Source Code - Full Android calculator with all features
Modern Java Architecture - Professional code with clean design patterns
Android SDK Integration - Complete mobile framework integration
Gradle Build Ready - Android project configuration
Main Calculator - Basic arithmetic with memory and history
Scientific Calculator - Trig, log, exp, sqrt, cbrt, power
Unit Converter - 10 categories with real-time conversion
Currency/Tip/Loan/BMI/Age/Percentage - Specialized calculators
Simple Graphing - Math function plotting
Theme Engine - System/light/dark theme support
Educational Documentation - Complete project information and guides
Example Usage - Ready-to-build Android application
Android Compatible - Works on API 24+ devices
Professional Code - Clean, well-documented, production-ready
Setup Guide - Complete installation and usage instructions
MIT License - Free for educational and commercial use

Android Calculator Application

Complete Android Calculator with basic calculator, scientific functions, unit converter, multiple calculators, comprehensive documentation, feature showcase, usage guide, and project details.

app/src/main/java/ - Complete Android calculator with all features
MainActivity.java - Main calculator with memory and history
CalculatorApp.java - Application class with theme and ads init
CalculatorUtils.java - Math and unit conversion utilities
AppPreferences.java - SharedPreferences for settings
AdManager.java - Unity Ads integration
ScientificCalculatorActivity.java - Scientific functions
UnitConverterActivity.java - Unit conversion
SimpleGraphingActivity.java - Function graphing
SettingsActivity.java - App settings
README.md - Comprehensive documentation and setup guide
docs/ - Architecture, features, install guides
Modern Java Interface - Clean, professional API design
Android SDK Integration - Complete mobile framework usage
Comprehensive Documentation - Complete project information and guides
Feature Showcase - Detailed calculator features with technical details
Usage Guide - Step-by-step installation and usage instructions
Code Examples - Java patterns, Android SDK integration, and mobile development
Project Structure - Detailed file and component architecture
Educational Content - Perfect for learning Android development concepts
Interactive Learning - Step-by-step mobile application concepts
Code Snippets - Educational Java and Android patterns and best practices
SEO Optimized - Search engine friendly educational content
Fast Performance - Optimized calculations and UI updates
Self-contained App - Works independently with Android Studio

Java Files Included

Professional Java files including calculator operations, Android SDK integration, multiple activities, and comprehensive documentation.

MainActivity.java - Main calculator with memory and history
CalculatorApp.java - Application class with theme and ads init
CalculatorUtils.java - Math and unit conversion utilities
AppPreferences.java - SharedPreferences for settings
AdManager.java - Unity Ads integration
ScientificCalculatorActivity.java - Scientific functions
UnitConverterActivity.java - Unit conversion
SimpleGraphingActivity.java - Function graphing
SettingsActivity.java - App settings
build.gradle - Dependencies and build configuration
AndroidManifest.xml - App configuration and activities
README.md - Comprehensive project documentation and setup guide
Modern Java 11 - Clean syntax with modern language features
Android SDK Integration - Professional mobile framework usage
Component Architecture - Activity-per-screen design
Educational Code - Perfect for learning Android development
Best Practices - Follows Java and Android development conventions
Production Ready - Optimized for performance and usability

Project Features

Comprehensive Android Calculator with basic arithmetic, scientific functions, unit converter, multiple calculators, and professional Java Android development.