--- title: Introducing Mobile Dev for Codex | daily.dev description: Callstack has released an initial preview of Mobile Dev, a plugin for OpenAI's Codex app that brings mobile development tooling directly into the agent... canonical: https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Introducing Mobile Dev for Codex | daily.dev og:description: Callstack has released an initial preview of Mobile Dev, a plugin for OpenAI's Codex app that brings mobile development tooling directly into the agent... og:url: https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv og:image: https://api.daily.dev/og/posts/6PGj2kSFV.png og:image:alt: Introducing Mobile Dev for Codex og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Introducing Mobile Dev for Codex **[Callstack Blog](https://daily.dev/sources/callstack-blog)** · 4 min read · 0 upvotes · 0 comments ## Summary Callstack has released an initial preview of Mobile Dev, a plugin for OpenAI's Codex app that brings mobile development tooling directly into the agent workspace. It streams live iOS simulators, Android emulators, and connected devices alongside the chat interface, allows device control, inspection, and annotation, aggregates native and JavaScript logs (iOS unified logs, Android logcat, Metro console), and provides live performance monitoring with CPU, memory, FPS tracking, and before/after comparison of agent changes. It works with Expo, React Native, SwiftUI, and other native mobile projects, built on MCP and MCP Apps plus OpenAI's extensions framework. It's installable now via GitHub with plans for the Codex marketplace. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How can I preview iOS and Android devices directly inside the Codex app while coding with an agent? Mobile Dev, a Codex plugin from Callstack, streams iOS simulators, Android emulators, and connected iPhones, iPads, and Android devices beside the chat, opened from the Codex sidebar into a fullscreen workspace. It supports Expo, React Native, SwiftUI, and other native mobile projects, letting Codex inspect accessibility elements and control the app through MCP tools. _daily.dev surfaces plugin releases like this for developers building mobile apps with AI agents._ ### What performance monitoring does the Mobile Dev plugin for Codex support on Android and iOS? It tracks app CPU and memory, expands individual thread charts, and shows device-wide Display FPS on supported devices, with Android recordings including display frame pacing and jank statistics. Codex can record an interaction, inspect interactive charts in chat, compare runs, and overlay a baseline against an updated recording to check whether a change helped. _Developers comparing mobile performance before and after agent changes can track tooling updates like this on daily.dev._ ### What protocol does Callstack's Mobile Dev plugin use to integrate with the Codex app? It builds on MCP (Model Context Protocol) and MCP Apps, which provide tools and embedded interactive interfaces for compatible AI clients, combined with OpenAI's extensions framework that adds integration points like sidebar views and conversation panels. The team keeps the underlying tools accessible through MCP so they can extend support beyond Codex desktop. _Those building agent-integrated dev tools can follow MCP ecosystem developments on daily.dev._ ## Similar posts on daily.dev - [Announcing Codex Plugins for React Native Development](https://daily.dev/posts/announcing-codex-plugins-for-react-native-development-fpdbgbv3c) · Callstack Blog · 0 upvotes · 0 comments - [OpenAI announces Codex for mobile devices](https://daily.dev/posts/openai-announces-codex-for-mobile-devices-xwxibqwio) · SD Times · 0 upvotes · 0 comments - [OpenAI says Codex is coming to your phone](https://daily.dev/posts/openai-says-codex-is-coming-to-your-phone-c24qjzdpe) · TechCrunch · 2 upvotes · 0 comments --- Tags: [#ai-agents](https://daily.dev/tags/ai-agents), [#mobile](https://daily.dev/tags/mobile), [#mcp](https://daily.dev/tags/mcp), [#react-native](https://daily.dev/tags/react-native), [#openai-codex](https://daily.dev/tags/openai-codex) [View this post on daily.dev](https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Introducing Mobile Dev for Codex","url":"https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv"},"datePublished":"2026-10-02T17:32:11.284Z","dateModified":"2026-10-02T17:43:58.065Z","description":"Callstack has released an initial preview of Mobile Dev, a plugin for OpenAI's Codex app that brings mobile development tooling directly into the agent...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d47d5adeb210bae2c0bbee1fe50c9b1b?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d47d5adeb210bae2c0bbee1fe50c9b1b?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Callstack Blog","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Callstack Blog","logo":"https://media.daily.dev/image/upload/s--3qItoroi--/f_auto,q_auto/v1774179048/logos/callstack-blog?_a=BAMAMiWQ0","url":"https://daily.dev/sources/callstack-blog"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"ai-agents,mobile,mcp,react-native,openai-codex","timeRequired":"PT4M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Callstack Blog","item":"https://daily.dev/sources/callstack-blog"},{"@type":"ListItem","position":3,"name":"Introducing Mobile Dev for Codex"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/introducing-mobile-dev-for-codex-6pgj2ksfv#faq","mainEntity":[{"@type":"Question","name":"How can I preview iOS and Android devices directly inside the Codex app while coding with an agent?","acceptedAnswer":{"@type":"Answer","text":"Mobile Dev, a Codex plugin from Callstack, streams iOS simulators, Android emulators, and connected iPhones, iPads, and Android devices beside the chat, opened from the Codex sidebar into a fullscreen workspace. 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