Calculator

About Calculator

📱 App Description

The Calculator App is a modern, user-friendly, and responsive calculator designed to work seamlessly on both mobile devices and tablets. It combines a clean interface with advanced features like history tracking , making it suitable for quick daily calculations as well as more complex mathematical tasks.

Built with Flutter, it adapts automatically to different screen sizes:

📲 Mobile layout: Simple, single-screen design with easy navigation to history.

💻 Tablet layout: Split-screen mode showing the calculator on one side and the history panel on the other for a productive workflow.

✨ Key Features

✅ Basic & Scientific Calculations

Perform standard arithmetic operations (+, −, ×, ÷).

Advanced functions like square root (√), percentages

✅ Beautiful User Interface

Modern gradient-based keypad buttons with shadows for a 3D effect.

Smooth responsive layout that scales beautifully across devices.

Dark theme with elegant colors that are easy on the eyes.

✅ Calculation History with Hive Storage

Every calculation is automatically saved to local storage using Hive.

Easily revisit past calculations through the History Screen.

Clear history with a single tap, with confirmation to avoid mistakes.

Refresh support for tablet view to instantly reload the latest history.

✅ Responsive Design

Mobile: Focused calculator view with history accessible via the app bar.

Tablet: Dual-pane view where you can see your calculator and history side by side for maximum productivity.

✅ Offline First

Works entirely offline without requiring internet access.

Fast and lightweight – optimized for performance.

✅ Custom Branding

Personalized app icon, splash screen, and branding image for a polished professional look.

🛠️ Tech Stack & Implementation

Flutter (Dart) → Cross-platform mobile and tablet support.

Hive → Lightweight NoSQL database for offline history storage.

Math Expressions Package → Safely parses and evaluates mathematical expressions with support for custom functions.

Responsive UI → Uses LayoutBuilder to detect screen width and switch between mobile and tablet layouts automatically.

Custom Splash & Icons → Integrated with flutter_native_splash and flutter_launcher_icons for a branded experience.

📊 Example Use Cases

Students solving math problems.

Professionals doing quick finance or percentage calculations.

Anyone needing a fast, reliable calculator with history tracking.

🚀 Why Choose This App?

Unlike standard calculators, this app is responsive, offline, stylish, and history-enabled. It doesn’t just calculate — it helps you stay organized by remembering your past calculations, and it’s optimized to work beautifully across all devices.