Developing a Budgeting and Expense App in Ruby


A budgeting and expense app is a useful tool for managing personal finances. Developing your own budgeting app with Ruby allows you to tailor it to your specific needs and learn valuable programming skills. In this guide, we'll explore the basics of creating a budgeting and expense app using Ruby.


Before you start, make sure you have the following prerequisites:

  • Basic knowledge of the Ruby programming language
  • A code editor (e.g., Visual Studio Code, Sublime Text)
  • Familiarity with basic web development concepts (HTML, CSS)

Step 1: Set Up the Project

Create a new Ruby project folder and set up the necessary files. You can structure your project with a Ruby script for the backend logic and HTML/CSS for the frontend interface. Organize your project into directories for clear separation of concerns.

Step 2: Design the User Interface

Design the user interface of your budgeting and expense app using HTML and CSS. You can create input forms for entering expenses, a budget summary section, and charts or graphs to visualize spending. Here's a simple HTML form for adding expenses:

<form action="/add_expense" method="post">
<label for="expense_name">Expense Name:</label>
<input type="text" id="expense_name" name="expense_name" required>
<label for="expense_amount">Expense Amount:</label>
<input type="number" id="expense_amount" name="expense_amount" required>
<input type="submit" value="Add Expense">

Step 3: Create Ruby Logic

Write Ruby code to handle user inputs, calculate budgets, and store expenses. You can use an SQLite database to save expense data or simply keep it in memory. Here's a sample Ruby script to add an expense:

require 'sinatra'
# Replace with your preferred data storage method (e.g., SQLite, in-memory array)
expenses = []
get '/' do
erb :index, locals: { expenses: expenses }
post '/add_expense' do
expense_name = params['expense_name']
expense_amount = params['expense_amount'].to_f
expenses << { name: expense_name, amount: expense_amount }

redirect '/'

Step 4: Display Budget and Expenses

Add logic to display the budget and expenses on the frontend. You can calculate the total expenses and compare them to the budget to give users an overview of their financial situation. Create charts or graphs to visualize the data for a more comprehensive experience.


Developing a budgeting and expense app in Ruby is a rewarding project that can help you improve your financial management skills while enhancing your programming expertise. This project can be expanded to include features like budget tracking, expense categories, and detailed reports.

Use this app to take control of your finances or share it with others looking for a simple and customizable budgeting solution. Ruby is a flexible language for web development, making it a suitable choice for building financial tools.

Enjoy building your budgeting and expense app with Ruby!