--- title: "REA（Reverse Engineer Anything）を使って自分のアプリを構築する方法" url: "https://reamcp.dev/ja/cases/how-to-use-rea-reverse-engineer-anything-to-build-your-own-a-06d43a" source: "https://www.youtube.com/watch?v=OR8j1S1xpe4" source_type: "resource" author: "Nuno Tavares | Automated Marketer" author_handle: "automatedmarketer" stars: 0 category: "アプリ機能の再現" categories: ["app-recreation"] tags: ["claude-code", "open-source", "screen-recorder", "screenshot-tool", "transcription", "vibe-coding"] added: "2026-10-17T02:26:34.656Z" updated: "2026-10-17T02:26:34.656Z" locale: "ja" content_locale: "ja" --- # REA（Reverse Engineer Anything）を使って自分のアプリを構築する方法 REA（Reverse Engineer Anything）を安全にインストールし、無料のオープンソースプロジェクトであるShareX、Greenshot、OpenWhisprを出発点として、3つの新しいアプリ（画面レコーダー、スクリーンショットマークアップツール、ディクテーション/会議メモアプリ）を構築する方法を示すビデオウォークスルーです。法的/ライセンスの制限、インストール前のリポジトリのスキャン、作業を1つのラボフォルダにまとめる方法をカバーしています。 ## Description REA（Reverse Engineer Anything）は現在、GitHub Trendingで1位のリポジトリです。安全な方法でインストールし、3つの無料オープンソースツールから3つの自分のアプリを構築しました。編集機能内蔵の画面レコーダー、スクリーンショットマークアップツール、ディクテーション＋会議メモアプリです。 公式REAリポジトリ：https://github.com/morluto/rea（MIT）。ソースアプリ：ShareX（GPL-3.0）、Greenshot（GPL-3.0）、OpenWhispr（MIT）。チャプターでは、REAの機能、利用規約に関する法的な線引き、安全なインストールとスキャン、Leverage Studio、Leverage Snap、Leverage Listenのライブビルドをカバーしています。正直な注記：REAは元のソースコードを提供するのではなく、証拠に基づいて動作を再構築します。公式はgithub.com/morluto/reaのみです。再構築の前にライセンスと規約を確認してください。文字起こしにはクラウドAIが使用されます。 ## Original README How To Use REA (Reverse Engineer Anything) To Build Your Own Apps REA (Reverse Engineer Anything) is the #1 repo on GitHub Trending right now. I installed it the safe way, then used it to build 3 of my own apps from 3 free, open-source tools: a screen recorder with a built-in editor, a screenshot markup tool, and a dictation + meeting-notes app. 🎁 The guide + prompts from this video (free Vibe Coding Incubator community): https://portal.vcinc.ai/communities/groups/vibe-coding-incubator/home/posts/6ad258488a4d7fc13cff8842 🛡️ Before you install ANY skill or repo, watch this: https://youtu.be/I3tOdyD45fs ⚙️ My Claude Code install video: https://youtu.be/lv1lQhcHWbI 🧰 6 Claude Code GitHub repos I use every day: https://youtu.be/L2JKgj7WzU4 🔧 What I used REA, Reverse Engineer Anything (free, MIT license; the ONLY official repo): https://github.com/morluto/rea App 1 started from ShareX (free, GPL-3.0): https://github.com/ShareX/ShareX App 2 started from Greenshot (free, GPL-3.0): https://github.com/greenshot/greenshot App 3 started from OpenWhispr (free, MIT): https://github.com/OpenWhispr/openwhispr Claude Code (in VS Code): https://claude.ai/download Lovable (builds the app for you): https://lovable.dev/?via=nuno-tavares 🤖 Join our Claude Code Workshop here: https://go.vcinc.ai/claudecode 🚀 Join the Vibe Coding Incubator community: https://vcinc.ai/ ⏱️ CHAPTERS 0:00 I built my own screen recorder with REA 0:23 Why everyone is talking about REA 0:51 What REA actually does (the locksmith idea) 2:20 Is software dead? No. Here's why 3:34 The legal line: terms of use and lawsuits 4:06 The 3 free apps we're building 4:24 Install REA safely: scan it first 5:02 Keep it in one lab folder 6:28 The one prompt that installs it 7:48 Bypass permissions (only after the scan) 8:15 App 1: my own screen recorder (from ShareX) 10:25 Leverage Studio: recorder + editor, built 11:52 App 2: the Lovable shortcut (from Greenshot) 14:31 Leverage Snap: the screenshot tool it built 15:39 App 3: dictation + meeting notes (from OpenWhispr) 17:29 Leverage Listen: live test 18:21 What you can build next ⚠️ HONEST NOTES • REA reads how an app works without running it. You get its best reconstruction plus the evidence, not the app's original source code. • Only github.com/morluto/rea is official. Copycat repos with "free download" pages keep popping up. Don't use them. • Install it into ONE project folder and have Claude scan it first. Don't run a setup that changes settings for your whole computer. • Check the license and the terms of use before you rebuild anything. I only studied free, open-source apps, and I built my own versions with new names. Rebuilding paid, closed software can break its terms. • These are first versions. Launching an app for real still means marketing, support and security work. • Leverage Listen uses cloud AI to transcribe and write the notes, so the audio and text leave your computer. #REA #ClaudeCode #ReverseEngineering 📣 Join Our Free Skool Community For HighLevel, Claude, n8n, AI & Automation. https://www.skool.com/automatedmarketer 🎓 GoHighLevel Masterclass + Plug-and-Play Templates. Enroll Now https://www.udemy.com/course/gohighlevel-masterclass-from-beginner-to-expert/?couponCode=GHLMASTERCLASS 🚀 From Strategy to Deployment, We Build the Technology That Powers Scalable Growth https://rapidactivemarketing.com/ 🔥 Steal My Best Strategies https://substack.com/@nunotavares1 🛠️ Want a Done-For-You HighLevel system or need staffing for your SaaS? Let our team do the heavy lifting for you → https://arcytex.com/ 📩 Get our weekly newsletter – GHL, AI, Tech & Growth Tips https://live.automatedmarketer.net/newsletter 💡 Weekly Blog – Tools, Tips, Strategies https://automatedmarketer.net/blog/ #nunotavares #nunomtavares #automatedmarketer #gohighlevel #gohighlevelexpert #AI #techupdates 🧠 Must-Have Tools We Use & Love 💲 HighLevel (Main Tool) https://live.automatedmarketer.net/automated-marketer-ghl 😍 FGFunnels (for Coaches & Creators) https://www.fgfunnels