Guide
How to use Codex from your phone in 2026
Five real ways developers run, monitor, and continue Codex sessions from a phone today — what they cost, which one fits your workflow, and where Sesori fits if OpenCode or Cursor is also part of your stack.
The 5 ways developers actually do it
Option 1
Codex in the ChatGPT App
Codex is available inside the ChatGPT mobile app on iOS and Android — it's a feature of ChatGPT, not a standalone Codex app. You pair your phone by scanning a QR code shown in the ChatGPT desktop app (macOS or Windows). Each phone is paired with each host, and you can switch between connected hosts. The active host must be awake, online, and signed in to the same account and workspace. Repository files, shell commands, MCP servers, and skills all come from the connected host. Workspace admins may need to enable Remote Control access.
Best for Codex-only workflows where you already use the ChatGPT desktop app on macOS or Windows.
Visit →Option 2
Happy Coder
Free, MIT-licensed mobile client for Claude Code, Codex, and OpenClaw, plus any ACP-compatible agent. Signal-grade encryption (TweetNaCl), zero-knowledge relay, optional self-hosted relay. Community-driven.
Best for Free, fully open-source, self-hostable mobile control.
Visit →Option 3
Omnara
Command center for Claude Code and Codex with optional cloud session persistence so your laptop can sleep. iOS, Android, web, and desktop. Session state is held server-side in Postgres rather than end-to-end encrypted. Cloud sandbox runs execute your code on Omnara infrastructure. Control plane is open source and self-hostable; compute is billed per machine.
Best for Cloud session persistence and a generous free tier.
Visit →Option 4
Remodex
Open-source (Apache 2.0) iPhone-only app for controlling Codex via an end-to-end encrypted bridge to your Mac. Self-hostable relay. Free with a paid tier. Note: there is a separate, unrelated Android app also named Remodex by a different developer — Remodex for Codex is iPhone-only.
Best for iPhone users on Codex who want an open-source, optionally self-hosted setup.
Visit →Option 5
Sesori
Mobile cockpit for AI coding sessions. Supports OpenCode, Codex, Cursor, Claude Code, Pi, OMP, and Hermes today. Native iOS and Android. End-to-end encrypted relay (X25519 + XChaCha20-Poly1305) — the relay sees only opaque traffic. Source-available bridge under the Functional Source License (FSL), using the API key or subscription you already have. Pick the agent per session, review file diffs, approve permissions, send voice input, queue messages, run parallel sessions, and get push notifications. Your machine must be running.
Best for Developers who want one mobile cockpit across OpenCode, Codex, Cursor, Claude Code, Pi, OMP, and Hermes rather than a separate client per agent.
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