Comparison

MermaidEditor vs Pro Markdown Editor and Reader

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Mermaid-js syntax highlighting
  • Code completion
  • Instant preview
  • Export to PNG/SVG
  • Cross-device editing
  • QuickLook preview extension
Features
Read full description

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.

About

Pro Markdown Editor and Reader

Create, edit, and preview Markdown files directly on your device. Import existing files, save your work locally, and easily share your documents with others. This version offers an ad-free experience for uninterrupted productivity.

Highlights
  • Create Markdown files
  • Edit Markdown files
  • Preview Markdown files
  • Import existing .md files
  • Save files locally
  • Share files
Features
Read full description

This is the Ad-free version of the popular Markdown Editor and Reader. Create and Edit Markdown files and save them on your device or import exiting .md files and preview them directly in the App and share the files with other people.

Screenshots

MermaidEditor3 screens
Pro Markdown Editor and Reader4 screens

Verdict

The call

The clearest difference is update cadence: Pro Markdown Editor and Reader at every 3 days against MermaidEditor's every 3 weeks. MermaidEditor's advantage is review sentiment (14% vs 0%) and chart position (#115 vs unranked). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

MermaidEditor costs $3.99 and Pro Markdown Editor and Reader $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

MermaidEditor ships an update every 3 weeks, Pro Markdown Editor and Reader every 3 days. The most recent releases landed on September 21, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 8 level
MermaidEditor versus Pro Markdown Editor and Reader: the parameters behind the verdict, then further details
ParameterMermaidEditorPro Markdown Editor and Reader
Price$3.99$3.99
Rating2.3 (10 ratings) — better—
Positive reviews13.8% of reviews — better0.0% of reviews
Number of ratings10 — better—
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#115 — better—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS14.013.0 — better
Further details — not scored
Size125 MB6 MB
Age rating4+4+
Developer基伟 徐Julian Lau

Customer experience

MermaidEditor

All ratings10 ratings
Positive30.0%
Neutral0.0%
Negative70.0%
Written reviews29 reviews
Positive13.8%
Neutral13.8%
Negative72.4%

Pro Markdown Editor and Reader

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

MermaidEditor

No in-app purchases

None

Pro Markdown Editor and Reader

No in-app purchases

Questions

Is MermaidEditor free?
MermaidEditor costs $3.99, with no in-app purchases.
Is Pro Markdown Editor and Reader free?
Pro Markdown Editor and Reader costs $3.99, with no in-app purchases.
Do MermaidEditor or Pro Markdown Editor and Reader have ads?
Neither MermaidEditor nor Pro Markdown Editor and Reader shows ads.
Which is updated more often, MermaidEditor or Pro Markdown Editor and Reader?
MermaidEditor ships an update every 3 weeks, and Pro Markdown Editor and Reader every 3 days. Most recently, MermaidEditor was updated on September 21, 2026 and Pro Markdown Editor and Reader on September 20, 2026.

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