Comparison

Happy vs Codex Relay

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

Happy Coder is the secure mobile companion for Codex and Claude Code that lets you continue your AI coding sessions anywhere (not affiliated with Anthropic or OpenAI). Built by developers who needed to check on their AI assistant's progress during coffee breaks, this app brings the full Codex and Claude Code experience to your phone with military-grade encryption. **Important**: This app requires Codex or Claude Code to be installed on your computer. Happy Coder is a companion app that connects to your existing Codex or Claude Code setup. **Key Features:** - Continue Codex and Claude Code sessions seamlessly between desktop and mobile - Push notifications for permission requests and task completion - Access conversation history even when your terminal is offline - End-to-end encryption - your code stays private - Real-time streaming of AI responses - Zero-knowledge architecture - we can't read your data **How It Works:** 1. Install the happy-coder CLI on your computer 2. Scan a QR code to securely pair your devices 3. Use 'happy' instead of 'codex' or 'claude' to start encrypted sessions 4. Switch between desktop and mobile instantly Perfect for developers who: - Want to monitor long-running tasks on the go - Need secure access to proprietary code discussions - Value privacy and open-source transparency - Work from coffee shops, trains, or anywhere Happy Coder uses the same encryption as Signal (TweetNaCl) and is completely open source. Your encryption keys never leave your device, and all data is encrypted before transmission. Built by Bay Area engineers who believe the best tools come from scratching your own itch. We needed a way to securely check on our AI coding assistant while away from our desks - so we built it and shared it with the community. Your code. Your privacy. Your Codex and Claude Code companion. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Codex Relay

Manage your Codex workflow remotely from your phone. Track active threads, send prompts, review output, and respond to requests. Designed for developers to stay connected to their work without being at their desk.

Highlights
  • Follow Codex conversations remotely
  • Send prompts and follow-up instructions
  • Respond to approval and input requests
  • Attach images for context
  • Review workspace and thread activity
  • Manage relay server state
  • Check usage statistics
Features
Read full description

Codex Relay brings your Codex workflow to your phone. Connect to your local Codex Relay server and keep track of active threads, responses, approvals, and workspace activity without staying at your desk. Send follow-up prompts, review assistant output, attach images for context, and respond when Codex needs input before it can continue. Built for developers who use Codex as part of real work, Codex Relay keeps the mobile experience focused, fast, and close to the terminal workflow. Key features: - Follow Codex conversations from your phone - Send prompts and follow-up instructions - Respond to approval and input requests - Attach images as context - Review workspace and thread activity - Manage connected relay server state - Check usage - Designed for local developer workflows Codex Relay requires a running Codex Relay server on your computer. Start the server with `npx codex-relay@latest`, then connect your device over your local network. GitHub: https://github.com/gronxb/codex-relay Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Happy4 screens
Codex Relay4 screens

Verdict

The call

The clearest difference is rating: Happy at 4.9 against Codex Relay's 4.2. Happy also leads on ratings volume (991 vs 54) and update cadence (weekly vs fortnightly). Codex Relay's advantage is in-app purchases (none vs 1). On price, review sentiment, ads and chart position 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. Codex Relay asks for nothing beyond the download.

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 991 ratings behind it against 54, so its average is the more settled of the two. Written reviews split almost evenly too, at 71% and 71% positive.

UpkeepUpdate frequency

Happy ships an update weekly, Codex Relay fortnightly. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

Scorecard5 real differences · 6 level
Happy versus Codex Relay: the parameters behind the verdict, then further details
ParameterHappyCodex Relay
PriceFreeFree
Rating4.9 (991 ratings) — better4.2 (54 ratings)
Positive reviews71.2% of reviews — better70.6% of reviews
Number of ratings991 — better54
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#85#75 — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better16.4
Further details — not scored
Size92 MB111 MB
Age rating4+17+
DeveloperBulka, LLCKang Sungyu

Customer experience

Happy

All ratings991 ratings
Positive96.9%
Neutral0.9%
Negative2.2%
Written reviews66 reviews
Positive71.2%
Neutral10.6%
Negative18.2%

Codex Relay

All ratings54 ratings
Positive79.6%
Neutral3.7%
Negative16.7%
Written reviews17 reviews
Positive70.6%
Neutral0.0%
Negative29.4%

In-app purchases

1 purchases

Happy

Subscriptions1
  • Plus Plus Monthly$19.991 Month
None

Codex Relay

No in-app purchases

Questions

Is Happy free?
Happy is free to download, with in-app purchases available.
Is Codex Relay free?
Codex Relay is free to download, with no in-app purchases.
Which has better reviews, Happy or Codex Relay?
Happy is rated higher. Happy averages 4.9 out of 5 from 991 ratings, while Codex Relay averages 4.2 from 54 ratings.
Do Happy or Codex Relay have ads?
Neither Happy nor Codex Relay shows ads.
Which is updated more often, Happy or Codex Relay?
Happy ships an update weekly, and Codex Relay fortnightly. Most recently, Happy was updated on September 22, 2026 and Codex Relay on September 21, 2026.
Which is more popular, Happy or Codex Relay?
Happy currently peaks at #85 in the App Store charts, and Codex Relay at #75. Chart position reflects recent download velocity rather than total install base.

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