
Cortex: Local Markdown Brain
On-device recall, plain files
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Free
In-App Purchases
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About
Cortex is a private, local-first Markdown workspace for iPhone and iPad. Your notes are real files you control, with fast editing, links, search, and on-device intelligence.
CORE FEATURES
- Create and organize plain Markdown notes
- Daily notes, tasks, templates, links, and backlinks
- Keyword search, Smart Search, knowledge graph, and canvas
- Save text and links from other apps with the Share Extension
- Create, search, and summarize notes with App Shortcuts and Siri
- Import, backup, and export your vault
- Use Apple Speech for dictation in supported languages
FREE
- A complete local Markdown vault
- Smart Search and knowledge graph
- Encrypted notes
- Basic dictation
- Local attachments up to 5 MB
- Import, backup, and export
CORTEX PLUS
- End-to-end encrypted sync across devices
- Ask, Recall, Insights, and semantic Connections
- Advanced dictation commands
- On-device OCR and audio transcription
- Attachments larger than 5 MB
Cortex requires no account and contains no ads or tracking. AI inference and embeddings run on your device. If you enable sync, Cortex encrypts your notes before sending authenticated ciphertext to the managed relay or a relay you configure; the relay cannot read note contents.
Terms of Use: https://cortex.jtrlabs.com/legal/terms.html
Privacy Policy: https://cortex.jtrlabs.com/legal/privacy.html
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What's New in Cortex
1.0.6
September 25, 2026
Improved the mobile tab bar so the purple capture button is fully visible, corrected Markdown-aware word counts, removed the unnecessary idle Ready label, and kept empty daily notes out of the Notes tab until you write in them.
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Subscriptions & In-App Purchases
Cortex Plus (Monthly)
All AI, sync & unlimited storage.
$4.991 Month


