How to Use AI Coding Tools to Build a Simple App in Under 2 Hours

Building an app can feel overwhelming, especially for indie hackers and solo founders who might not have a background in coding. But what if I told you that with the right AI coding tools, you can build a simple app in under two hours? It sounds too good to be true, but I’m here to show you how it can be done, based on our experiences in 2026.

Prerequisites: What You Need Before You Start

Before diving in, make sure you have the following:

1. Basic Understanding of Programming: Familiarity with concepts like variables and functions will be helpful.
2. Access to AI Coding Tools: We’ll be using tools like GitHub Copilot and Replit.
3. A Clear Idea for Your App: Start with something simple, like a to-do list app.

Step-by-Step Guide to Build Your App

Step 1: Set Up Your Environment (15 minutes)

• Create a GitHub Account: If you don’t have one, sign up for free.
• Set Up Replit: Go to Replit.com and create a new project. Choose a language you’re comfortable with (JavaScript is a good start).
• Install GitHub Copilot: If you’re using VS Code, install the GitHub Copilot extension. It’s free for individual developers until you hit a usage cap.

Step 2: Outline Your App Structure (20 minutes)

Define what features your app will have. For a simple to-do list, you might want:

• Add a task
• Delete a task
• Mark a task as complete

Step 3: Use AI to Write Code (1 hour)

1. Generate Code Snippets: Start typing comments in your code editor like // Function to add a task and let GitHub Copilot suggest full function implementations.
2. Iterate Quickly: Use Replit’s live preview feature to see changes in real-time. This feedback loop helps you adjust quickly.
3. Test as You Go: Make sure to run your code often to catch errors early.

Step 4: Final Touches (20 minutes)

• Add Basic Styling: Use CSS to make your app visually appealing. You can ask Copilot for CSS suggestions too.
• Deploy Your App: Use Replit’s built-in deployment feature to publish your app with one click.

Expected Output

By the end of this process, you should have a functioning to-do list app that can add, delete, and mark tasks as complete.

Troubleshooting: What Could Go Wrong

• Code Errors: If you encounter errors, check for typos or syntax mistakes. Use the console to debug.
• Deployment Issues: If your app doesn’t deploy, ensure you've saved all changes and check if Replit is experiencing any outages.

What’s Next?

Once you’ve built your app, consider these next steps:

• Gather Feedback: Share your app with friends or on social media to get user feedback.
• Iterate: Based on feedback, add new features or refine existing ones.
• Explore Monetization: Consider turning your app into a paid product or offering premium features.

Tool Comparison: AI Coding Tools for Building Apps

Here’s a quick comparison of the AI coding tools we discussed:

| Tool | Pricing | Best For | Limitations | Our Take | |-------------------|--------------------------|-------------------------------|-------------------------------|------------------------------------| | GitHub Copilot | $10/mo, free tier for individuals | Code suggestions in real-time | Limited to code snippets only | We use this for fast prototyping. | | Replit | Free tier + $7/mo pro | Collaborative coding | Limited to web apps | Great for quick deployments. | | Tabnine | $12/mo, free tier available | Code completion | May not support all languages | We don’t use this; prefer Copilot. | | Codeium | Free | AI-powered code suggestions | Limited integrations | We tried this but found it lacking. | | Sourcery | Free + $19/mo pro | Refactoring suggestions | Best for Python only | Useful for cleaning up code. | | Ponicode | Free tier + $30/mo pro | Unit test generation | Limited to specific languages | We don’t use this; not essential. |

Conclusion: Start Here

If you’re looking to build a simple app quickly, start by trying out GitHub Copilot and Replit. They offer a balance of ease-of-use and functionality that can help you get to market faster. Remember, the key is to keep your app simple and iterate based on user feedback.