---
title: "REA の実際の使い方：自分のアプリに Reverse Engineer Anything を使ってオンラインに公開した"
url: "https://reamcp.dev/ja/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: "ツール・連携"
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: "ja"
content_locale: "ja"
---

# REA の実際の使い方：自分のアプリに Reverse Engineer Anything を使ってオンラインに公開した

REA（Reverse Engineer Anything）の YouTube ウォークスルー：作者は Claude Code に MCP をインストールし、自分の Mac アプリ HoverSpeech を指定して、その読み上げ機能を Web アプリとして再構築し、トークンコストを報告しています。セットアップ手順、チャプター、無料の REA スターターガイドと REA GitHub リポジトリへのリンクが含まれています。

## Description

REA（Reverse Engineer Anything）の実際の使い方。これは、Claude Code や Codex がソースコードなしでアプリの中身を調べ、どのように構築されているかを解明できるようにする、バイラルな GitHub リポジトリです。私は自分の Mac アプリ HoverSpeech にこれを指定し、Claude にその読み上げ機能を Web アプリとして再構築させ、Hostinger Connector でオンラインに公開しました。最後に、そのコスト（約 5600 万トークン、API 価格で約 28.60 ドル、または週間 Claude プランの 2%）と、ソフトウェアを構築または販売する人にとってこれが何を意味するかについて共有します。この動画は Hostinger がスポンサーです。主なポイント：REA はコーディングエージェントを Ghidra や Hopper などのリバースエンジニアリングツールに接続し、平易な英語で操作できるようにします。元のソースコードは提供されません。セットアップは 1 つのコマンドまたは 1 つのプロンプトです。自分のソフトウェアで公平にテストしてください。全体の実行で約 5600 万トークンを使用しました。ヒント：自分が所有しているか、調査を許可されているソフトウェアにのみ指定してください。一度に 1 つの機能について尋ねてください。承認プロンプトはオンのままにしてください。

## 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