OpenMark

OpenMark brings beautiful markdown rendering to your iPhone and iPad. Open any .md file from iCloud Drive, Files, or any file provider and see it rendered with full formatting — headings, code blocks, tables, math equations (KaTeX), diagrams (Mermaid), GitHub-style alerts, and interactive checklists.

Features:
- Full markdown rendering with syntax-highlighted code blocks
- KaTeX math equations — inline and display mode
- Mermaid diagrams rendered natively
- GitHub-style alerts (Note, Tip, Important, Warning, Caution)
- Interactive checkboxes — tap to toggle, changes save back to file
- Export to PDF or HTML, copy as markdown
- Outline sidebar on iPad for quick navigation
- Dark mode support
- 4 themes: Default, Nord, Solarized, One Dark
- Works offline — all rendering is bundled, no internet required
- Universal Purchase — buy once, get both Mac and iOS

Edit your markdown on Mac with the full OpenMark editor. Read anywhere on iPhone and iPad.