Rebuild any paid app for free with Reverse Engineer Anything

Igor from The AI Advantage points ChatGPT (or Codex/Claude) at the open-source Reverse Engineer Anything repo, inside a project with folder access, and asks it to make a version of an app he paid for. He recreated Screen Brush as AIA Ink and a Slido clone.

The AI Advantage · YouTube · published Oct 29, 2026 · Software & DevOps

Rebuild any paid app for free with Reverse Engineer Anything — video by The AI Advantage▶ Watch on YouTube
Prompt
Use this repo: <paste the Reverse Engineer Anything GitHub URL>. Make me a version of <app name> that runs on my computer. Save the files in this project's folder and install it. Then I'll ask for adjustments, like a transparent background.

Visual breakdown

Point a desktop AI app that can create files at the open-source Reverse Engineer Anything repo, name an app you use, and it works backwards from the finished product to build your own free, customizable version. Igor rebuilt Screen Brush in about 2 minutes of work.

The problem: Paid apps cost a subscription and come with features you don't need, and building a copy by hand takes hours of feature-by-feature work.

From a paid app to your own copy

  1. Repo linkFree, public Reverse Engineer Anything repository on GitHub, added by pasting its URL into a chat
  2. Project with folder accessNew ChatGPT project given a folder on your computer, then a new chat inside it
  3. Higher-tier modelSettings turned up; 'approve for me' access recommended for beginners
  4. One-line promptMake me, then the name of the app that exists on your computer
  5. Follow-up messagesAdjustments such as a transparent background, with a few more messages
  6. Your own appInstalled on the machine (AIA Ink), or hosted via ChatGPT's sites feature (Slido copy)
InputsSetup / manualAI agentResult

What you need

  1. An AI that can create files, ideally on a higher plan
  2. The desktop app, so it can manipulate local files
  3. The repo link, no subscription cost

By the numbers

2 minof work for AIA Ink
$0repo cost

Do it yourself

Works in ChatGPT desktop; Codex works even better, and the Claude desktop app or Claude Code work too.

  1. Copy the Reverse Engineer Anything GitHub link from the video description
  2. Open the desktop AI app and create a new project
  3. Give the project access to a new folder on your computer
  4. Start a new chat in the project and paste the repo URL
  5. Prompt: make me, then the app's name, plus a sentence of functionality
  6. Send more messages to adjust it

He also rebuilt Slido, and mentions someone who copied Adobe apps as Artcraft.

Tips from the video

  • Run the chat inside the project that has folder access
  • Use one of the higher model settings
  • Beginners should choose 'approve for me' to stay in control
  • You can strip features you don't need, and add ones like a transparent background

Distilled from the video’s captions

How to try it

  1. Open ChatGPT.
  2. Copy the prompt and fill in the [placeholders].
  3. Watch The AI Advantage's video for the full walkthrough and setup.

Related use cases

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