prefers-color-scheme > dark default) so iOS Safari's status bar and<br>Android Chrome's navbar track whatever the page is actually showing. --> theme + platform attributes across<br>swaps. Static HTML ships with no data-theme on , so without<br>this the swap target reverts to the CSS default (dark) and the page<br>flashes dark on every navigation. -->Claude Code on iPhone & Android | Codex CLI | Cosyra

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Build from anywhere.

Cosyra is a mobile cloud agent platform for iPhone and Android<br>with Claude Code, Codex CLI, OpenCode, and Gemini CLI<br>pre-installed. Start a task at your desk. Approve it from the train.

Download on App Store Get it on Google Play<br>Scan to install on your phone iPhone or Android

★ 4.7 on App Store<br>1 hour free, no card<br>cancel anytime

when is this for you ↓<br>03:47 pager goes off<br>You're on-call. No laptop in reach.<br>Something's wrong in prod and you're forty minutes from a keyboard. Open Cosyra, tail the logs, read the stack trace, patch the env var, redeploy, with Claude Code helping you triangulate. From the phone already in your hand.<br>On-call from phone

08:12 inbound train<br>Forty minutes of commute. Use them.<br>Instead of doomscrolling, open the repo you've been meaning to refactor, hand Claude Code a plan, and review the diff by your stop. Hibernation hands the session back to your laptop when you get to work.<br>Code on the commute

14:55 kitchen counter<br>You didn't want to bring a laptop today.<br>Day trip, weekend, family time. You're not giving up your dev environment. You just don't want to carry it. A phone's already in your pocket, and a real Ubuntu workspace is one tap away.<br>The no-laptop setup

~/project · claude<br>$ claude

╭───────────────────────────────────╮

│ Claude Code · ~/project · main │

╰───────────────────────────────────╯

> refactor the auth middleware to refresh tokens

I'll extract the validation, add auto-refresh, and

update the error handling. Editing 2 files…

src/middleware/auth.ts

- import { verify } from 'jsonwebtoken'

+ import { verify, decode } from 'jsonwebtoken'

+ import { refreshToken } from '../lib/auth'

✓ 12 tests passed · pushed to origin/main

2-min tutorial · install to first diff

Watch the whole loop: install, boot the container, paste a key, ship a<br>change, on a phone.

01 Install the app.<br>Cosyra ships on the App Store and Google Play. Sign in with Apple, Google, or email. No credit card to start.

02 Get a fresh Ubuntu container.<br>On first launch we provision an isolated Ubuntu 24.04 x86_64 container on Azure. It is yours alone, your files, your processes, your shell history.

03 Pick your agent.<br>Claude Code, Codex CLI, OpenCode, and Gemini CLI are pre-installed. Paste your provider API key once and you are ready to prompt.

04 Code from anywhere.<br>Type from the on-screen keyboard, pair a Bluetooth one, or dictate. Files persist on 30 GB of storage. Sessions survive the screen locking.

05 Close the app. Pick up where you left off.<br>On Pro, the container hibernates after ten minutes idle and resumes with state intact, even on a different device. Phone in the morning, laptop in the afternoon, same shell.

Anthropic Claude Code Long-context refactors, when 50+ files are in motion. Setup guide → OpenAI Codex CLI Tight loops, unfamiliar APIs, one-shot fixes, explore-by-prompt. Setup guide → Google Gemini CLI Long-context work on a paid AI Studio/Vertex key (Gemini's free personal tier ended 2026-06-18). Setup guide → Open source OpenCode Provider-agnostic, swap Anthropic, OpenAI, Google without rewriting config. Setup guide →

It's a real machine, not a sandbox or a chat wrapper.

Ubuntu 24.04<br>30 GB persistent<br>Node · Python · Git<br>tmux · vim<br>Session hibernation<br>install any package

What a mobile coding terminal really is →

isolation Your code stays in your box.<br>Every account gets its own cloud container. Your repos and files live inside your environment, never pooled, never shared across users.

your key, your bill Bring your own API key.<br>Use your own Anthropic, OpenAI, or Google account. Your usage, your billing. Cosyra never sits between you and your provider.

encryption Keys encrypted on-device.<br>API keys are stored with platform-native encryption on your phone and sent over TLS straight to your container. They don't live on our servers.

no lock-in Start free, leave clean.<br>One hour of compute free, no credit card. Subscribe through the App Store or Google Play and cancel anytime. Nothing auto-charges behind your back.

Want the architecture? See exactly how isolation, key handling, and egress<br>work on the security page.

Feature comparison: Cosyra, Claude Code Remote Control, CloudCLI,<br>Replit mobile, Termux, and SSH-to-VPS for running AI coding agents on<br>a phone.<br>Feature Cosyra Replit mobile Claude Remote Control CloudCLI Termux SSH to VPS Works on iPhone native app native app via Claude app client only Works on Android native app native app via Claude app client only Keeps moving when your laptop sleeps Android Only if server is on Multiple AI...