# OpenMark: Markdown Viewer — Native editor, Mermaid & LaTeX

> Native markdown viewer for iOS with Mermaid, LaTeX, and code highlighting. (iPhone/iPad app by Rotate, LLC..)

- Source: https://appshunter.io/ios/app/openmark-markdown-viewer/id6759467015 (this page in markdown: same URL + `.md`)
- Developer: [Rotate, LLC.](https://appshunter.io/developer/1435998437)
- Category: Developer Tools, Productivity
- Price: $9.99
- Age rating: 4+
- Requires: iOS 18 · 8 MB
- Languages: American English
- Released: 2026-03-02
- Data updated: 2026-11-05
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/openmark-markdown-viewer/id6759467015/reviews.md

## What is OpenMark?

OpenMark is a beautiful markdown reader for iPhone and iPad. Open any .md or .mdx file and see it rendered with full typography, Mermaid diagrams, LaTeX math and interactive checkboxes.

The perfect companion to OpenMark for Mac — or a standalone reader for anyone who works with markdown.

FEATURES

• Beautiful rendered view with full markdown support
• Mermaid diagrams — flowcharts, sequence, class, Gantt and Kanban rendered inline
• Math and LaTeX — KaTeX rendering for equations, subscripts and matrices
• Code blocks highlighted in 30+ languages
• GitHub-style alerts — NOTE, TIP, IMPORTANT, WARNING and CAUTION callouts
• Wiki-style [[links]] between documents
• 4 themes — Default, Nord, Solarized Dark and One Dark
• Interactive checkboxes — tap to toggle task list items
• Find in page — search within your document
• Reading time and document info
• Export and print — share as PDF, HTML, or send to any app
• Adjustable font size
• Outline sidebar on iPad — jump to any heading
• Opens files from iCloud Drive, Google Drive, Dropbox and Files
• Spotlight indexing — find recently opened documents from Search
• Home Screen Quick Actions — jump to recent files from the app icon
• Dark and light mode, following your system setting
• Works completely offline — no internet required

DESIGNED FOR iPAD

On iPad, an outline sidebar sits alongside your document for quick navigation through long files. Find in page works with ⌘F on an external keyboard.

PERFECT FOR

• Reading README files and documentation on the go
• Reviewing markdown drafts from your Mac
• Opening .md files from any cloud service or app

Also available on Mac with full editing.

## Key features

- Mermaid diagram rendering
- LaTeX math support
- Code block highlighting
- GitHub-style alerts
- Interactive checkboxes
- Offline functionality
- Multiple themes

## Chart rankings

- #52 in Top Paid · Developer Tools (US App Store)

## Is OpenMark safe?

Not enough ratings yet to assess OpenMark.

## Is OpenMark legit?

OpenMark: Markdown Viewer has limited verification signals. The AppsHunter Legitimacy Score for OpenMark is 58 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/openmark-markdown-viewer/id6759467015/reviews.md

### 2/5 — Constantly Crashing

*2026-08-24*

When it works, it works wonderfully. But lately I cannot open .md files without the app crashing. Often times I can’t even get it to work at all.

### 4/5 — Just what I needed

*2026-08-03*

This app is great, it is a terrific Markdown renderer and editor. I use a monospace font for this editor and it would be great if I could specify a Document mode font different from Editor mode.

### 5/5 — FINALLY

*2026-05-24*

This is what I’ve been looking for. Simple, native, renders nicely, no bloated features I don’t care about. The ONLY thing I’d like to see is in-line editing and rendering in the same view.

### 5/5 — Quick & Lightweight

*2026-04-17*

Beautiful markdown app. Lighting fast with new modern MacOS features like QuickLook built right in. Love the formatting - just works !

### 3/5 — Syntax Highlighting

*2026-03-23*

The app is nice and feel native, but for a PAID app not having syntax highlighting for code blocks is crazy…

### 5/5 — Nice and Light

*2026-03-22*

Opens Quick, fast easy edits and no bloat! Love it.

### 5/5 — Love the app, and one small request

*2026-03-20*

This app is fantastic, and I love that it’s so light and native. One small request: it would be great to have a keyboard shortcut to toggle between view modes, in addition to cmd-1 and cmd-2. Keep up the great work!

## Frequently asked questions about OpenMark

### What is OpenMark?

OpenMark is a markdown viewer for iPhone and iPad. It allows you to render markdown files with advanced features like Mermaid diagrams, LaTeX math, and code highlighting. It is designed to be a companion to the Mac version or a standalone reader.

### Does OpenMark support offline viewing?

Yes, OpenMark works completely offline. No internet connection is required to view your markdown files, making it convenient for use anywhere.

### What devices does OpenMark support?

OpenMark is available for iPhone and iPad. It is also available on Mac, offering a consistent experience across Apple devices.

### How much does OpenMark cost?

OpenMark is a paid application, priced at $9.99. This one-time purchase grants you access to all its features.

### Can OpenMark render Mermaid diagrams and LaTeX math?

Yes, OpenMark offers full support for rendering Mermaid diagrams for flowcharts and sequence diagrams, as well as KaTeX rendering for mathematical equations and matrices.

### How often is OpenMark updated?

The latest version of OpenMark is 1.4.1, last updated on October 28, 2026. Updates typically include new features, bug fixes, and performance improvements.

### Does OpenMark have ads?

No, OpenMark does not contain advertisements. As a paid application, it provides an ad-free experience for its users.

### Can I open files from cloud services with OpenMark?

Yes, OpenMark can open files directly from cloud services such as iCloud Drive, Google Drive, and Dropbox, as well as the native Files app.

## Version history (last 2 releases)

### 1.4.1 — 2026-10-28

• Markdown files from Google Drive are no longer grayed out in the file picker
• Math with subscripts and matrices now renders correctly
• Wiki-style [[links]] and GitHub-style alerts render in your documents
• Reading time in Document Info
• Sharing fixes — errors are reported instead of failing silently
• Security update to the bundled math and diagram libraries

### 1.3 — 2026-04-23

No release notes.

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## More apps by Rotate, LLC.

- [LockPact: Screen Time Partner](https://appshunter.io/ios/app/lockpact-screen-time-partner/id6759302382)

All apps by Rotate, LLC.: https://appshunter.io/developer/1435998437

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-05.*