OK-ia Markdown Viewer
Markdown & Mermaid reader
Free
Open your Markdown files with Mermaid diagrams, Leaflet maps, callouts and entity highlighting — faithful to ok-ia.ch, 100% offline.
OK-ia Markdown Viewer displays your Markdown files exactly as the ok-ia.ch viewer does —
same typography, same colours, same rendering pipeline.
FEATURES
• Faithful Markdown rendering (headings, tables, lists, quotes)
• Mermaid diagrams: flowchart, sequence, gantt, pie, mindmap — with full-screen zoom
• Leaflet maps (Obsidian plugin style): positioned markers, CARTO/OSM base maps,
full-screen button for portrait or landscape navigation
• Obsidian callouts (note, tip, warning, bug…), wiki-links, entity highlighting (NER)
• Document summary by Apple Intelligence — on-device, properly formatted (chapters, bold, lists)
• Chat with the document: ask questions, structured answers grounded in its content alone,
generated on-device (summary and chat require an Apple Intelligence capable device)
• Siri, Spotlight and Shortcuts: “Open the latest report”, “Summarise a report”…
• Automatic table of contents, in-document search, adjustable text size
• Paginated PDF export (A4 or Letter), Word and PowerPoint; .md file sharing
• Dark mode, portrait and landscape, iPhone + iPad + Mac
• Interface in French, English, German, Spanish and Italian
• 100% offline: rendering, diagrams, callouts and the AI summary need no connection
(only the map base tiles load online)
Open a .md file from Files, the iOS share sheet, another app, or a web link (mdviewer://).
“What the algorithms still miss.” — ok-ia.ch
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Five languages, and your reports become conversational.
NEW
• Interface in English, French, German, Spanish and Italian — the app follows
your device's language, or the one you pick in Settings
• Chat with the document: ask questions about the open report. Answers are
structured into chapters and draw on its content alone
• The opening screen offers questions taken from the document itself
• Answers are written in the app's language, even when the report is written
in another
• PDF export on A4 (or Letter, depending on your region): a proper paginated
document, ready to annotate with the Pencil in Notes or to send on. Maps and
diagrams appear whole, and no heading is left stranded at the foot of a page
FASTER, CLEARER
• Image-heavy reports appear straight away: images load as you read instead of
holding up the whole document
• Entity highlighting now works whatever language the report is written in
• Offline, a map says it is unavailable and lists its markers instead of
showing a grey frame
• Very large documents show a waiting message rather than an empty screen
The summary and the chat require an Apple Intelligence-capable device (iOS 26 or
later). Like the rest of the app, they run on the device: no text is sent
anywhere.
The developer, Patrick Ostertag, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Patrick Ostertag
- Size
- 5.3 MB
- Category
- Productivity
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 4 more
- English, French, German, Italian, Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 OK-ia
