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.