MermaidEditor vs Markdown Mermaid
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MermaidEditor
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.
- Mermaid-js syntax highlighting
- Code completion
- Instant preview
- Export to PNG/SVG
- Cross-device editing
- QuickLook preview extension
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MermaidEditor is a diagram and chart editor, powered by mermaid-js. And MermaidEditor supports iPhone, iPad and Mac, with one app you can edit diagram everywhere on any device. MermaidEditor supports mermaid-js syntax highlighting and code completion, so it can help writing diagram and chart clearly, easily and quickly. You can also easily export charts as PNG images or SVG files from the editor, or share image to other people with system actions. √ All Platforms - Both Mobile and Desktop platforms supported, you can edit diagram documents on iPhone, iPad or Mac - Document browser based app, easily edit files on device and sync document between devices - Multiple windows ready, it makes the editor more powerful on iPadOS - Keyboard shortcuts ready on iPadOS with keyboard connected √ Powerful Editor - Syntax Highlighting for mermaid-js grammar - Auto Completion in editor helps typing keywords quickly - Code Snippets likes parallel block in sequence diagram makes life easier - Instant Parsing Error indicator for locating syntax error √ Instant Preview - Auto Generated Preview when typing in editor - Zoom and Pan to move preview for checking diagram's detail - With Scroll wheel it can be easily zoom diagram on macOS √ Integrated Extensions - Thumbnail support, every .mmd file will has its own thumbnail when saving file - QuickLook Preview extension helps you preview mermaid document in Files app on iPhone or iPad and Finder on macOS √ Sharing - Save diagram document as its source with .mmd extension - Export diagram to PNG image or SVG file with one click For mermaid-js grammar, please visit https://mermaid-js.github.io/mermaid/ for documentation.
Markdown Mermaid
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Simple, lightweight and easy to use markdown and mermaid viewer. Use this for reading through documents you download or use a url.
Screenshots
Verdict
The clearest difference is price: Markdown Mermaid at Free against MermaidEditor's $3.99. MermaidEditor's advantage is update cadence (every 3 weeks vs every 3 months) and chart position (#111 vs unranked). On ads, in-app purchases, device support and iOS requirement 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
Markdown Mermaid is free to download; MermaidEditor costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MermaidEditor ships an update every 3 weeks, Markdown Mermaid every 3 months. The most recent releases landed on October 22, 2026 and October 17, 2026 respectively.
| Parameter | MermaidEditor | Markdown Mermaid |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 2.3 (10 ratings) — better | — |
| Positive reviews | 13.8% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #111 — better | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 125 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | 基伟 徐 | Mark Duenas |
In-app purchases
MermaidEditor
No in-app purchases
Markdown Mermaid
No in-app purchases
Questions
Is MermaidEditor free?
Is Markdown Mermaid free?
Do MermaidEditor or Markdown Mermaid have ads?
Which is updated more often, MermaidEditor or Markdown Mermaid?
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