openote - AI Markdown Notes

Summarize notes in one tap with on-device AI. Preview Mermaid diagrams in markdown instantly. Sync across all your devices through iCloud Drive.

openote — On-device AI Markdown Notes

AI that runs on your device. Standard .md files. iCloud Drive sync. openote keeps your notes truly yours.

WHY OPENOTE?

iCloud Drive sync openote syncs your notes across all your devices through your own iCloud Drive. No third-party servers in between.

On-device AI (iOS 18.1+) Summarize a note in one tap. Get smart tag suggestions. Turn plain text into Mermaid diagrams. Powered by Apple Foundation Models running entirely on your device — fully offline, no data leaves your device.

Real-time Mermaid diagram preview Write diagrams in markdown and see them render instantly. Flowcharts, sequence diagrams, class diagrams — no plugins, no internet required.

Standard .md files No proprietary format. Open them in any editor, on any platform. Move them out anytime. Truly lock-in free.

No account. Fully offline. No sign-up. No email collected. No tracking. AI runs only on your device.

CORE FEATURES

Markdown Editor

• Real-time syntax highlighting
• Auto-save every 0.5 seconds
• Customizable toolbar (markdown, lists, Mermaid shortcuts)
• Word and character count

Smart Search

• Full-text search across title and body (FTS)
• Highlighted search results
• Korean, English, and Japanese search support

Tags and Folders

• #hashtag syntax for instant categorization
• Tag autocomplete
• Folder-based organization

AI Features (iOS 18.1+)

• Note summary (one tap)
• Smart tag suggestions
• Text to Mermaid diagram conversion

Mermaid Diagrams

• Live preview
• Pinch to zoom and pan
• Offline rendering (no CDN required)

Export

• PNG export
• Open .md files on Mac

Siri and Shortcuts

• "Create a note in openote"
• "Search openote for..."
• Spotlight search integration

PRO UPGRADE

For power users who want more:

• Unlimited AI usage
• 10+ premium themes (Midnight, Nord, Dracula, and more)
• Transparent PNG, PDF, SVG export
• 3x high-resolution output
• 12+ exclusive Pro app icons
• Accent color customization

WHAT MAKES OPENOTE DIFFERENT

• Syncs through your own iCloud Drive
• AI runs on your device, not on a server
• Native Mermaid preview, no plugins
• Notes are standard .md files you can open anywhere

PRIVACY

• No account required
• No email collected
• Notes never sent to any server
• AI runs entirely on your device
• iCloud uses only your own Apple account

Your notes are yours alone.

openote — Write freely. Own everything.