# MarkChart vs Happy

The clearest difference is rating: Happy at 4.9 against MarkChart's 4.2. Happy also leads on ratings volume (991 vs 13) and chart position (#35 vs unranked). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. MarkChart sells 1 one-off in-app purchase and Happy sells 1 in-app purchase, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

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 13, so its average is the more settled of the two. Written reviews complicate that: 72% of MarkChart's written reviews are positive against 71% of Happy's, so the app with the better star average is not the one people write more warmly about.

MarkChart ships an update fortnightly, Happy weekly. The most recent releases landed on September 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | MarkChart | Happy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (13 ratings)](https://appshunter.io/ios/app/markchart-mermaid-editor/id6475648822/reviews) | **[4.9 (991 ratings)](https://appshunter.io/ios/app/happy-codex-and-claude-code-app/id6748571505/reviews)** |
| Number of ratings | 13 | **991** |
| Positive reviews | **72.3% of reviews** | 71.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | — | **#35** |
| Size | 46 MB | 92 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexandre Colucci](https://appshunter.io/developer/1478787437) | [Bulka, LLC](https://appshunter.io/developer/1677403762) |

## What reviewers say

### MarkChart

[App page](https://appshunter.io/ios/app/markchart-mermaid-editor/id6475648822)

This app allows you to easily create and preview diagrams using a Markdown-inspired text syntax. It offers templates for various diagram types and supports automatic updates when used with external editors. Export your creations to common image formats.

**Highlights:** Mermaid diagram editing, Real-time preview, Built-in templates, Automatic updates, Export to PDF, PNG, SVG, Syntax highlighting, Dark Mode support

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MarkChart Pro | $12.99 | one-time |


### Happy

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

**Currently charting:** #35 Top Grossing · Developer Tools, #74 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 |


## Frequently asked questions

### Is MarkChart free?

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

### Is Happy free?

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

### Which has better reviews, MarkChart or Happy?

Happy is rated higher. MarkChart averages 4.2 out of 5 from 13 ratings, while Happy averages 4.9 from 991 ratings.

### Do MarkChart or Happy have ads?

Neither MarkChart nor Happy shows ads.

### Which is updated more often, MarkChart or Happy?

MarkChart ships an update fortnightly, and Happy weekly. Most recently, MarkChart was updated on September 23, 2026 and Happy on September 24, 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.*