Open Source Mobile-Use MCP and AI Agent

An independent developer released Buddy 2.2, an open-source Android app that runs Claude Code, OpenAI Codex, OpenCode or Google's Antigravity CLI inside a bundled Alpine Linux environment (via proot) and controls the phone through an accessibility service and a local MCP server on 127.0.0.1. Buddy requires Android 11+ on a 64-bit device and needs no PC, adb, root or API key, using the user's own Claude, ChatGPT or Google account, or OpenCode's free models with no account; it asks for approval before anything is sent, posted, bought or deleted. The app is in closed testing on Google Play and also distributed as a direct APK, and the developer describes version 2.2 as early with rough edges, tested mostly on a OnePlus 12 running Android 16.

A floating chat bubble that lets Claude Code, Codex, OpenCode or Antigravity use your Android phone. Type or say what you want, like "reply to Sam that I'm running late" or "add a Switch 2 to my Amazon cart". Buddy reads the screen, taps and types to get it done, and asks you before anything is sent, posted, bought or deleted. It runs inside the app, on your own plan: Claude Code https://docs.claude.com/en/docs/claude-code with your Claude plan, Codex with your ChatGPT plan, Google's Antigravity CLI https://antigravity.google with your Google account, or OpenCode https://opencode.ai with its free models and no account at all. No PC, no adb, no root, no API key. Get it on Google Play setup closed testing · Download the APK https://github.com/ghorbelhamdi/buddy-android/releases/latest/download/buddy.apk · Android 11+, 64-bit Buddy-producthunt.mp4 <sub Codex turns on the lights while OpenCode's free model adds a Switch 2 to the Amazon cart real recordings, waiting sped up </sub | <sub Chats with any agent</sub | <sub Tool calls fold into one line</sub | <sub Setup guide and themes</sub | | Uses your apps | Messages, shopping, smart home, settings: anything on screen. Add instructions while it works. | | Asks first | Approve, Deny or Change before anything is sent, posted, bought or deleted. | | Shows you how | "Show me how to turn on dark mode": it points at each step and waits for your tap. | | Acts on notifications | "When a customer asks on WhatsApp, reply with our opening hours", with your OK or a countdown you can stop. | | Voice | Talk to it and have replies read aloud. | | Builds apps | In developer mode, "make me a calculator app" builds and installs a real APK on the phone. | | Phone tools anywhere | The same tools as a local MCP server for your own Claude Code, Codex, OpenCode or Antigravity sessions. | Status: 2.2, early. It works well day to day but has rough edges. Tested most on a OnePlus 12 Android 16 . Buddy is an independent project, not made by or affiliated with Anthropic, OpenAI or Google. Buddy app / bubble ──► Buddy's Linux Alpine via proot : claude, codex, opencode or agy ▲ │ └──────────── streamed replies ◄──────────────────────┤ ▼ Buddy accessibility service ◄──── MCP on 127.0.0.1 phone tools Buddy is a normal Android app with an accessibility service, the kind of permission screen readers use. The agent runs in a small Linux inside the app and uses Buddy's phone tools read the screen, tap, type, scroll, open apps over a local MCP server. No adb or Wireless debugging, and it works without Wi-Fi. You need a 64-bit Android 11+ phone, plus a Claude, ChatGPT or Google account for those agents. OpenCode's free models need no account. 1. Install Buddy. - Google Play recommended : join the tester group https://groups.google.com/g/buddy-testers , opt in https://play.google.com/apps/testing/app.buddy.assistant , then install Buddy from Google Play. Every tester helps it get to production. - APK: download buddy.apk https://github.com/ghorbelhamdi/buddy-android/releases/latest/download/buddy.apk and open it. This version also has developer mode and self-updates. 2. Follow the setup guide that opens on first launch: pick your agent, turn on the accessibility service, install and sign in, and try a first task. Install blocked or "Restricted setting"? See Setup in detail https://github.com/ghorbelhamdi/buddy-android/blob/main/docs/GUIDE.md setup-in-detail . Install the new APK over the old one: chats, settings and sign-ins stay don't uninstall first . You can also ask Buddy to "update yourself" , or let Obtainium https://obtainium.imranr.dev do it how https://github.com/ghorbelhamdi/buddy-android/blob/main/docs/GUIDE.md updating . The Play version updates through Play. An accessibility service is powerful, so please read this. - Local only. The phone tools listen on 127.0.0.1 with a random per-install token. - Buddy enforces the approvals, not the agent. Messaging, shopping and money apps start on a hard limit: Buddy itself stops on buttons like Send, Pay and Delete until you OK them. - Prompt injection is the main risk. A message or web page could try to give the agent orders. On-screen text is treated as content, and the approval card is the backstop, so read it. - No passwords. Buddy never types passwords, codes or payment details; it hands those to you. - What leaves the phone: only what the agent sends to its provider Anthropic, OpenAI, Google, OpenCode's service or the provider you connected to answer you. More in Security in detail https://github.com/ghorbelhamdi/buddy-android/blob/main/docs/GUIDE.md security-in-detail . Found a problem? Please open a private security advisory instead of a public issue. What does it cost? Buddy is free. The agent uses your plan's limits, or nothing at all with Antigravity's free plan or OpenCode's free models. iPhone? No. iOS doesn't let apps operate other apps. Which phones? 64-bit Android 11 or newer. On some brands, set Buddy's battery use to Unrestricted . Does it need a computer, adb or root? No. - User guide https://github.com/ghorbelhamdi/buddy-android/blob/main/docs/GUIDE.md : chats, models, voice, notification rules, the bubble, Remote Control, SSH and developer mode - Benchmark https://github.com/ghorbelhamdi/buddy-android/blob/main/benchmark/README.md : which model uses a phone best - Privacy policy https://github.com/ghorbelhamdi/buddy-android/blob/main/docs/PRIVACY.md In the press: ProPakistani https://propakistani.pk/2026/10/12/this-free-android-app-lets-claude-code-use-your-phone/ , The Neutral https://theneutral.pk/this-free-android-app-lets-ai-control-your-phone-without-a-pc/ , Trendshift https://trendshift.io/repositories/289557 October 2026 Bug reports, ideas and pull requests are welcome: see CONTRIBUTING.md https://github.com/ghorbelhamdi/buddy-android/blob/main/CONTRIBUTING.md . If Buddy is useful to you, a ⭐ helps other people find it. ./gradlew assembleRelease Android Studio / Gradle ./build.sh on the phone in Termux, no Gradle → build/buddy-release.apk build.sh needs pkg install openjdk-17 aapt2 d8 apksigner python and android.jar from platform-36 at ~/android-sdk/android-36/android.jar . It creates a signing key at ~/.buddy-keys/release.jks on first run: back it up, since updates must be signed with the same key. Gradle release signing reads BUDDY KEYSTORE and BUDDY KEYSTORE PASSWORD optionally BUDDY KEY ALIAS , BUDDY KEY PASSWORD . The version lives in BuildInfo.java , and the project layout is in CONTRIBUTING.md https://github.com/ghorbelhamdi/buddy-android/blob/main/CONTRIBUTING.md project-layout . Apache-2.0 https://github.com/ghorbelhamdi/buddy-android/blob/main/LICENSE . Geist fonts: SIL Open Font License. Icons: Material Symbols Apache-2.0 . Bundled proot GPL-2.0 , talloc LGPL-3.0 and libandroid-shmem BSD-3-Clause : see third party https://github.com/ghorbelhamdi/buddy-android/blob/main/third party/README.md for licences and source.