# Happy vs Markdown Mermaid

The clearest difference is in-app purchases: Markdown Mermaid at none against Happy's 1. Happy's advantage is update cadence (weekly vs every 3 months) and chart position (#75 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Happy sells 1 in-app purchase, starting at $19.99 per month. Markdown Mermaid asks for nothing beyond the download.

Happy ships an update weekly, Markdown Mermaid every 3 months. The most recent releases landed on October 30, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Happy | Markdown Mermaid |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (1.1K ratings)](https://appshunter.io/ios/app/happy-codex-and-claude-code-app/id6748571505/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 70.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#75** | — |
| Size | 98 MB | 44 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Bulka, LLC](https://appshunter.io/developer/1677403762) | [Mark Duenas](https://appshunter.io/developer/1083533055) |

## What reviewers say

### Happy

[App page](https://appshunter.io/ios/app/happy-codex-and-claude-code-app/id6748571505)

**Currently charting:** #75 Top Free · Developer Tools (US App Store)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Plus Monthly | $19.99 | per month |


### Markdown Mermaid

[App page](https://appshunter.io/ios/app/markdown-mermaid/id6757712908)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Happy free?

Happy is free to download, with in-app purchases available.

### Is Markdown Mermaid free?

Markdown Mermaid is free to download, with no in-app purchases.

### Do Happy or Markdown Mermaid have ads?

Neither Happy nor Markdown Mermaid shows ads.

### Which is updated more often, Happy or Markdown Mermaid?

Happy ships an update weekly, and Markdown Mermaid every 3 months. Most recently, Happy was updated on October 30, 2026 and Markdown Mermaid on October 28, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*