MermaidEditor vs MarkChart
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.
MarkChart
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.
- Mermaid diagram editing
- Real-time preview
- Built-in templates
- Automatic updates
- Export to PDF, PNG, SVG
- Syntax highlighting
- Dark Mode support
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Create beautiful Mermaid diagrams at the speed of thought. MarkChart gives you a focused editor, live preview, visual canvas, built-in templates, and polished exports in a native iPhone and iPad app. Mermaid is a Markdown-inspired syntax for defining diagrams with text. Use MarkChart to create flowcharts, sequence diagrams, state diagrams, class diagrams, entity relationship diagrams, Gantt charts, timelines, mind maps, Venn diagrams, pie charts, requirement diagrams, Git graphs, user journeys, and more. Start with a template, edit the Mermaid source with syntax highlighting, refine your diagram visually on the interactive canvas, then share it as PDF, PNG, or SVG. CREATE BEAUTIFUL DIAGRAMS Turn Mermaid text into polished diagrams in a focused iPhone and iPad app. EDIT MERMAID DIAGRAMS Create and edit your Mermaid diagrams directly in MarkChart. THEMES AND SYNTAX HIGHLIGHTING Choose polished themes and understand your diagram source with syntax highlighting. VISUAL EDITING Edit diagrams visually with the interactive canvas. TEMPLATES Instantly create sequence diagrams, state diagrams, flowcharts and more. DIAGRAM TYPES Create flowcharts, sequence diagrams, state diagrams, Venn diagrams, mind maps, timelines, Gantt charts, Git graphs, class diagrams, entity relationship diagrams, user journeys, pie charts, Sankey diagrams, XY charts, and more. QUICK LOOK Preview your .mmd and .mermaid files right from the Files app. EXPORT Easily export your diagrams to PDF, PNG, and SVG formats. SHORTCUTS Create automations with the Shortcuts app. FITS RIGHT AT HOME MarkChart is optimized for iOS and iPadOS, with Dark Mode support. MARKCHART PRO MarkChart Pro is an optional one-time universal purchase for iOS, iPadOS, and macOS. Privacy Policy: https://markchart.app/privacypolicy/ Terms of use: https://markchart.app/terms/ If you have any questions or ideas, please reach out at support@markchart.app
Screenshots
Verdict
The clearest difference is review sentiment: MarkChart at 72% against MermaidEditor's 14%. MarkChart also leads on price (Free vs $3.99) and rating (4.2 vs 2.3). MermaidEditor's advantage is in-app purchases (none vs 1) and chart position (#114 vs unranked). On ratings volume, update cadence, ads and device support 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
MarkChart is free to download; MermaidEditor costs $3.99 up front. MarkChart sells 1 one-off in-app purchase. MermaidEditor asks for nothing beyond the download.
MarkChart holds the better App Store score, 4.2 against 2.3. Both are backed by a comparable volume of ratings — 10 and 13 respectively. Written reviews point the same way: 14% of MermaidEditor's written reviews are positive against 72% of MarkChart's.
MermaidEditor ships an update every 3 weeks, MarkChart fortnightly. The most recent releases landed on September 21, 2026 and September 23, 2026 respectively.
| Parameter | MermaidEditor | MarkChart |
|---|---|---|
| Price | $3.99 | Free — better |
| Rating | 2.3 (10 ratings) | 4.2 (13 ratings) — better |
| Positive reviews | 13.8% of reviews | 72.3% of reviews — better |
| Number of ratings | 10 | 13 — better |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #114 — better | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, Mac |
| Requires iOS | 14.0 — better | 18.2 |
| Further details — not scored | ||
| Size | 125 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | 基伟 徐 | Alexandre Colucci |
Customer experience
MermaidEditor
MarkChart
In-app purchases
MermaidEditor
No in-app purchases
MarkChart
- MarkChart Pro$12.99
Questions
Is MermaidEditor free?
Is MarkChart free?
Which has better reviews, MermaidEditor or MarkChart?
Do MermaidEditor or MarkChart have ads?
Which is updated more often, MermaidEditor or MarkChart?
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