What it does
Happy brings several AI coding assistants into one app: Anthropic's Claude, OpenAI's Codex and xAI's Grok. You sign in with the subscriptions you already have, so it doesn't add another bill.
Your sessions continue on your phone through its mobile app, with what passes between your devices encrypted. You can also invite someone into a session so you both watch and guide the same AI agent.
This repository holds the mobile app (iPhone, Android and web), the original command-line tool and the server that relays messages. The desktop app lives in a separate repository.
Who it's for
Programmers who use AI coding assistants and want to manage them in one place or check in from their phone.
Can I use it without coding?
With some setup. The mobile app is easy to use, but it controls coding tools that you install on your computer. New to this? Start here.
Can I run it?
- Cost
- Free, but needs an AI accountThe software is free, but it uses an online AI service (like OpenAI or Anthropic), which usually charges for use.
- Runs on
- Phone, Web browser, Mac, Windows, Linux
- Computer
- An ordinary computer is fine
- Privacy
- Sends what you give it to an online service
- API key
- Not needed
Try it
- Get the Happy app for your phone, or the desktop app for Mac, Windows or Linux.
- Sign in with the Claude, Codex or Grok subscription you already have.
- Start a coding session on your computer and continue it from your phone.
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page. Copies with similar names exist for many popular projects.
- License (MIT): Very permissive: free to use, change and share, including for business.
- What you type or upload is sent to an online service. Avoid sharing private or sensitive information.
- More on staying safe
Where people are talking about it
- Show HN: Happy Coder – End-to-End Encrypted Mobile Client for Claude CodeHacker News · Aug 2025