Comparison

Happy vs Codex Claude

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Happy

This app provides a secure mobile interface for AI coding assistants, allowing you to continue sessions and monitor progress from anywhere. It features end-to-end encryption and a zero-knowledge architecture for ultimate privacy. Seamlessly switch between desktop and mobile for uninterrupted AI coding.

Highlights
  • Seamless desktop and mobile session continuation
  • Push notifications for AI tasks
  • Offline access to conversation history
  • End-to-end encryption for code privacy
  • Real-time streaming of AI responses
  • Zero-knowledge architecture
Features
Read full description

Your coding agent shouldn't wait for you to get back to your desk. A task can run for an hour and then stop five minutes in to ask for permission or a decision. Happy lets you answer from your phone, and the same agent carries on in the same repository with the same tools and context. Happy is the mobile app for Claude Code and Codex. The agents keep running on your own computer, and your phone is how you start them, steer them and review their work. WHAT YOU CAN DO FROM YOUR PHONE • Start a new session or pick up one you began at your desk • Get notified when an agent needs input or finishes • Approve or deny permission requests, or let a session run in Auto mode • Choose the model and reasoning effort from the providers set up on your computer • Review changes: a file list, colored diffs, and the full set of changes on a branch • Attach a screenshot or photo to your prompt • Browse sessions in one list or grouped by project, with each checkout's chats as tabs • Open a side chat next to a session without losing your place • Drafts follow you between your phone and your computer HOW IT WORKS Happy runs on your computer, and this app connects to it. 1. Install Happy Desktop from happy.engineering, or if you prefer the terminal, run: npm install -g happy 2. Create an account in the app. You don't need an email address or a password. 3. Scan the QR code your computer shows to link it to your phone. Then start a session from either device. What you see on your phone is the same live session that's running on your computer. YOU WILL NEED • A computer running Happy Desktop or the Happy CLI • Access to the coding agents you want to use, such as a Claude or ChatGPT/Codex plan or API key. Happy uses your existing accounts. PRIVATE BY DESIGN Sessions are end-to-end encrypted. Your code, agent and encryption keys stay on your devices. Happy's servers only relay and store encrypted session data and can't read your prompts, responses or code. OPEN SOURCE The app, the CLI and the server are MIT-licensed and on GitHub. Read the code, run your own build or host your own server. ALSO ON DESKTOP Happy Desktop adds a harness that works across providers and lets you switch models in the middle of a task. The sessions it starts show up on your phone too. Happy is an independent project. It is not affiliated with or endorsed by Anthropic or OpenAI. Claude and Claude Code are trademarks of Anthropic. Codex and ChatGPT are trademarks of OpenAI. Privacy Policy: https://happy.engineering/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Codex Claude

Instantly generate custom code for websites, apps, and scripts using AI. This tool provides tailored code suggestions for various platforms and programming languages, making it ideal for developers and builders of all levels.

Highlights
  • Instant custom code generation
  • AI-powered code suggestions
  • Supports frontend, backend, mobile, and APIs
  • Generates app features, UI components, and logic
  • Supports multiple programming languages and frameworks
Features
Read full description

Build websites and edit code with AI. AI Website Builder Code Editor helps you generate website projects from prompts, edit HTML, CSS, and JavaScript, preview your work, and export files from one mobile workspace. Create landing pages, portfolio sites, business websites, and product pages faster with AI-powered project generation and code editing. Features: • AI Website Builder • Web IDE for HTML, CSS, and JavaScript • Code Editor • Instant Website Preview • Template-based project creation • File export Perfect for founders, makers, indie hackers, students, and developers building websites on the go. Subscription required for premium features. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Happy4 screens
Codex Claude3 screens

Verdict

The call

The clearest difference is review sentiment: Happy at 72% against Codex Claude's 22%. Happy also leads on rating (4.9 vs 4.2) and ratings volume (1K vs 61). Codex Claude's advantage is iOS requirement (13.0 vs 15.1). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Happy sells 1 in-app purchase, starting at $19.99 per month and Codex Claude sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Happy holds the better App Store score, 4.9 against 4.2. That said, the two scores are not equally well evidenced: Happy has 1K ratings behind it against 61, so its average is the more settled of the two. Written reviews point the same way: 72% of Happy's written reviews are positive against 22% of Codex Claude's.

UpkeepUpdate frequency

Happy ships an update weekly, Codex Claude every 8 days. Both last shipped on October 14, 2026.

Scorecard4 real differences · 7 level
Happy versus Codex Claude: the parameters behind the verdict, then further details
ParameterHappyCodex Claude
PriceFreeFree
Rating4.9 (1K ratings) — better4.2 (61 ratings)
Positive reviews71.6% of reviews — better22.2% of reviews
Number of ratings1K — better61
Update frequencyWeekly — betterEvery 8 days
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank#89 — better#91
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size98 MB67 MB
Age rating4+4+
DeveloperBulka, LLCTetiana Oliinyk

Customer experience

Happy

All ratings1,024 ratings
Positive96.7%
Neutral1.0%
Negative2.3%
Written reviews67 reviews
Positive71.6%
Neutral10.4%
Negative17.9%

Codex Claude

All ratings61 ratings
Positive78.7%
Neutral3.3%
Negative18.0%
Written reviews9 reviews
Positive22.2%
Neutral0.0%
Negative77.8%

In-app purchases

1 purchases

Happy

Subscriptions1
  • Plus Plus Monthly$19.991 Month
2 purchases

Codex Claude

Subscriptions2
  • Vibely AI Plus$6.997 Days
  • Vibely AI Plus$99.991 Year

Questions

Is Happy free?
Happy is free to download, with in-app purchases available.
Is Codex Claude free?
Codex Claude is free to download, with in-app purchases available.
Which has better reviews, Happy or Codex Claude?
Happy is rated higher. Happy averages 4.9 out of 5 from 1K ratings, while Codex Claude averages 4.2 from 61 ratings.
Do Happy or Codex Claude have ads?
Neither Happy nor Codex Claude shows ads.
Which is updated more often, Happy or Codex Claude?
Happy ships an update weekly, and Codex Claude every 8 days. Most recently, Happy was updated on October 14, 2026 and Codex Claude on October 14, 2026.
Which is more popular, Happy or Codex Claude?
Happy currently peaks at #89 in the App Store charts, and Codex Claude at #91. Chart position reflects recent download velocity rather than total install base.

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