--- title: "How to ACTUALLY Use REA: I used Reverse Engineer Anything on My Own App and Put It Online" url: "https://reamcp.dev/en/cases/how-to-actually-use-rea-i-used-reverse-engineer-anything-on--b43cbb" source: "https://www.youtube.com/watch?v=wpV92IBwG88" source_type: "resource" author: "Moe Lueker" author_handle: "moelueker" stars: 0 category: "Tools & integrations" categories: ["tools-integrations"] tags: ["claude-code", "ghidra", "macos", "rea", "reverse-engineering", "tutorial"] added: "2026-10-21T02:09:47.901Z" updated: "2026-10-19T20:37:00.000Z" locale: "en" content_locale: "en" --- # How to ACTUALLY Use REA: I used Reverse Engineer Anything on My Own App and Put It Online A YouTube walkthrough of REA (Reverse Engineer Anything): the author installs the MCP in Claude Code, points it at his own Mac app HoverSpeech, reconstructs its read-aloud feature as a web app, and reports token cost. Includes setup steps, chapters and links to a free REA starter guide and the REA GitHub repo. ## Description How to actually use REA (Reverse Engineer Anything), the viral GitHub repo that lets Claude Code or Codex look inside an app with no source code and work out how it's built. I pointed it at my own Mac app, HoverSpeech, had Claude rebuild its read-aloud feature as a web app, and put it online with the Hostinger Connector. At the end I share what it cost (about 56 million tokens, roughly $28.60 at API prices, or 2% of my weekly Claude plan) and what I think this means if you build or sell software. This video is sponsored by Hostinger. Key takeaways: REA connects your coding agent to reverse engineering tools like Ghidra and Hopper and lets it drive them in plain English; it doesn't give you the original source code; setup is one command or one prompt; test it fairly on your own software; the whole run used about 56 million tokens. Tips: only point it at software you own or are allowed to examine, ask about one feature at a time, keep approval prompts on. ## Original README How to ACTUALLY Use REA: I used Reverse Engineer Anything on My Own App and Put It Online Put your own app or site online with Hostinger Connector, extra 10% off with code MOE-LUEKER: https://moelueker.com/go/hostinger-rea How to actually use REA (Reverse Engineer Anything), the viral GitHub repo that lets Claude Code or Codex look inside an app with no source code and work out how it's built. I pointed it at my own Mac app, HoverSpeech, had Claude rebuild its read-aloud feature as a web app, and put it online with the Hostinger Connector. At the end I share what it cost (about 56 million tokens, roughly $28.60 at API prices, or 2% of my weekly Claude plan) and what I think this means if you build or sell software. This video is sponsored by Hostinger. 🔗 RESOURCES: • Free REA starter guide with every prompt from this video: https://moelueker.com/go/rea-guide • Hostinger Connector, code MOE-LUEKER for an extra 10%: https://moelueker.com/go/hostinger-rea • Try the voice page we built, live: https://moelueker.com/go/hoverspeech-try-rea • HoverSpeech, my free text-to-speech app for Mac: https://moelueker.com/go/hoverspeech-rea • Rambleproof, the dictation app I use in this video: https://moelueker.com/go/rambleproof-rea • REA on GitHub: https://moelueker.com/go/rea-github 🔍 KEY TAKEAWAYS: • REA connects your coding agent to reverse engineering tools like Ghidra and Hopper and lets it drive them in plain English. • It doesn't give you the original source code. You get the agent's best reconstruction of the logic, the evidence for each claim, and a list of what it couldn't work out. • Setup is one command, or one prompt in Claude Code or Codex. Native Mac apps need Ghidra (free) or Hopper. • Test it fairly: an empty folder, the same download a stranger gets, and no access to your source code. • From the findings, Claude rebuilt the read-aloud feature as a web app and Hostinger Connector put it online. • The whole run used about 56 million tokens, roughly $28.60 at API prices. • Your code isn't what protects your product anymore. Your servers, users, distribution and insights are. 📈 TIPS FOR USING REA: • Only point it at software you own or are allowed to examine. • Ask about one feature at a time, not "rebuild this whole app". • Keep the approval prompts on. REA runs with your permissions. • For simple jobs, a regular coding agent can often do the same work. If you build apps with AI, the useful part isn't copying anyone. It's learning how good software works and shipping your own. 🎥 SUBSCRIBE, LIKE & COMMENT: What would you point REA at? Tell me in the comments, and subscribe for more on how to build and ship with AI. ❤️ LOVED THIS VIDEO?: You'd make my day if you support this type of content by buying me a coffee 🤩 https://moelueker.com/go/support-rea ⏱️ CHAPTERS: 00:00 REA, the viral repo that reverse engineers apps 01:27 What REA actually is, and what it isn't 02:20 Why I pointed it at my own app 02:56 How to install REA in Claude Code or Codex 03:43 Check that the REA MCP is ready 04:21 Reverse engineering my Mac app 05:26 The web clone next to the real app 06:17 The finished clone 06:50 Put it online with Hostinger Connector 07:39 Hostinger plans and discount code 08:16 Connect Hostinger to Claude 08:50 Deploy with one prompt 09:29 Testing the live page 10:19 What this means if you build or sell software 10:39 What it cost 11:18 Before you try this 11:29 Free guide and links #REA #ReverseEngineering #ClaudeCode #reverseEngineerAnything