# MermaidEditor vs Slint Viewer

The clearest difference is review sentiment: Slint Viewer at 100% against MermaidEditor's 14%. Slint Viewer also leads on price (Free vs $3.99) and rating (5.0 vs 2.3). MermaidEditor's advantage is ratings volume (10 vs 1) and chart position (#107 vs unranked). On ads and in-app purchases there is nothing between them.

Slint Viewer is free to download; MermaidEditor costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Slint Viewer holds the better App Store score, 5.0 against 2.3. That said, the two scores are not equally well evidenced: MermaidEditor has 10 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 14% of MermaidEditor's written reviews are positive against 100% of Slint Viewer's.

MermaidEditor ships an update every 3 weeks, Slint Viewer every 6 weeks. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | MermaidEditor | Slint Viewer |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [2.3 (10 ratings)](https://appshunter.io/ios/app/mermaideditor/id1581312955/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/slint-viewer/id6773729654/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 13.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Paid | **Free** |
| Best chart rank | **#107** | — |
| Size | 125 MB | 49 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [基伟 徐](https://appshunter.io/developer/391905315) | [SixtyFPS GmbH](https://appshunter.io/developer/1757134627) |

## What reviewers say

### MermaidEditor

[App page](https://appshunter.io/ios/app/mermaideditor/id1581312955)

**Currently charting:** #107 Top Paid · Developer Tools (US App Store)

Create and edit diagrams and charts using mermaid-js syntax with real-time preview. Export your creations as PNG or SVG files and share them across all your Apple devices.

**Highlights:** Mermaid-js syntax highlighting, Code completion, Instant preview, Export to PNG/SVG, Cross-device editing, QuickLook preview extension

**Features:** Vision Pro support

**In-app purchases:** none


### Slint Viewer

[App page](https://appshunter.io/ios/app/slint-viewer/id6773729654)

This developer tool allows you to preview Slint user interfaces directly on your iPhone or iPad. It connects to your code editor over a local network, displaying your .slint designs live as you make changes. Some programming experience is recommended for optimal use.

**Highlights:** Live UI preview on iOS, Connects to code editor, Real-time design updates, Supports Slint toolkit

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MermaidEditor free?

MermaidEditor costs $3.99, with no in-app purchases.

### Is Slint Viewer free?

Slint Viewer is free to download, with no in-app purchases.

### Which has better reviews, MermaidEditor or Slint Viewer?

Slint Viewer is rated higher. MermaidEditor averages 2.3 out of 5 from 10 ratings, while Slint Viewer averages 5.0 from 1 ratings.

### Do MermaidEditor or Slint Viewer have ads?

Neither MermaidEditor nor Slint Viewer shows ads.

### Which is updated more often, MermaidEditor or Slint Viewer?

MermaidEditor ships an update every 3 weeks, and Slint Viewer every 6 weeks. Most recently, MermaidEditor was updated on October 24, 2026 and Slint Viewer on October 14, 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.*