happier
Unofficial build

Happy, with the newest models.

An Android build of Happy, the open-source app for running Claude Code and Codex from your phone, with Opus 5.5 and GPT-6.1 Sol in the menu and set up for happy.colombus.fun.

Build details

App
Happier
Package
fun.colombus.happier
Version
1.8.0+2 · Happy cli-1.2.5
Released
2026-10-08
Server
happy.colombus.fun
Device
Android 7+, 64-bit (arm64)
SHA-256
fe34b7804ef921af6aaf6c0e8c2c049d2f0ad1a90fb592c7fc9151aee8ac3793
Download APK

About 114 MB. Older versions are on the releases page.

Not made by the Happy team. This is Happy's own source code with two small patches, built and signed separately. For the official app, use the Play Store.

What's different

Newer models in the model menu
Highlighted ones aren't in the official app yet.

Claude

  • Fable 5.1
  • Fable 5
  • Opus 5.5
  • Opus 5.5 1M
  • Sonnet 5.5
  • Sonnet 5.5 1M
  • Opus 5
  • Opus 5 1M
  • Sonnet 5
  • Haiku 5.5
  • Haiku 5.5 1M
  • Haiku 4.5

Codex

  • GPT-6.1 Sol
  • GPT-6 Astra
  • GPT-6 Sol
  • GPT-6 Luna
  • GPT-5.6 Sol
  • GPT-5.6 Terra
  • GPT-5.6 Luna
  • GPT-5.5
Uses happy.colombus.fun
Instead of Happy's hosted server. You can change it in Settings → Server.
Installs next to the official app
It has its own package name, so both can stay on the same phone.
No push notifications
Use the official app next to it if you want notifications.

Install

  1. Tap Download APK on your phone.
  2. Open the downloaded file. If Android asks, allow your browser to install apps.
  3. Open Happier and log in.

Keep it updated

Automatically, with Obtainium

Install Obtainium, tap Add app, paste https://github.com/TheDyXer/happier and tap Install. Installed this way, it updates Happier in the background.

Already installed from the browser

Obtainium still finds new versions, but each update needs a tap.

Log in

Accounts on happy.colombus.fun are separate from accounts on Happy's hosted server. Pick the case that fits:

First time on this server

Tap Create account.

Already logged in on another device

On that device: Settings → Account → Link New Device, then scan the code this app shows.

Same phone as the official app

In the official app: Settings → Account → Secret Key (tap to copy). In this app: Restore an existing account → Use a secret key instead, then paste.

Connect your computer

  1. Install the Happy command-line tool on the computer that runs Claude Code or Codex: 
    npm install -g happy
  2. Create ~/.happy/settings.json (Windows: %USERPROFILE%\.happy\settings.json) with: 
    { "serverUrl": "https://happy.colombus.fun" }
  3. Run happy, choose Mobile App and scan the code with this app.

A model only works if the Claude Code or Codex on your computer knows it, so keep them updated.

In a browser

The same Happy, with the same model menus: happyweb.colombus.fun