flutter_simple_calculator

Package Overview

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A Flutter widget that offers a straightforward, customizable calculator for integration into apps. Designed for simplicity and ease of use, it supports basic arithmetic operations and can be seamlessly embedded in various UIs. The package is compatible across all major platforms, including mobile, web, and desktop, making it ideal for applications requiring quick calculation functionality without complex dependencies.

Use cases

Simple arithmetic in forms
Budgeting or expense tracking apps
Educational tools for math learning
Quick calculation features in productivity apps
In-app calculators for games or quizzes

Key features

Easy integration with minimal setup
Supports basic math operations
Cross-platform compatibility
Customizable appearance
Lightweight and fast performance

Suitable for

Developers needing a basic calculator
Educational app creators
Apps with simple math needs
Prototyping rapid calculation features
Projects prioritizing lightweight dependencies

Considerations

Limited to basic operations
No advanced functions like trigonometry
Not suitable for complex financial calculations
UI customization requires some coding
No built-in history or memory features

Original README

Original README snapshot from the linked source repository. Visit the repository for the latest content.

Flutter widget that provides simple calculator. You can easily integrate a calculator to your apps.

Default style

With custom styles

SimpleCalculator(
  theme: const CalculatorThemeData(
    displayColor: Colors.black,
    displayStyle: const TextStyle(fontSize: 80, color: Colors.yellow),
    /*...*/
  ),
)

Localize

SimpleCalculator(
  numberFormat: NumberFormat.decimalPattern("fa_IR")
    ..maximumFractionDigits = 6,
)

Getting Started

To use this plugin, add flutter_simple_calculator as a dependency in your pubspec.yaml file.

dependencies:
 flutter_simple_calculator:

Import the library in your file.

import 'package:flutter_simple_calculator/flutter_simple_calculator.dart';

See the example directory for a complete sample app using SimpleCalculator. Or use the SimpleCalculator like below.

SimpleCalculator(
  value: 123.45,
  hideExpression: true,
  onChanged: (key, value, expression) {
    /*...*/
  },
  theme: const CalculatorThemeData(
    displayColor: Colors.black,
    displayStyle: const TextStyle(fontSize: 80, color: Colors.yellow),
  ),
)

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