# Cortex: Local Markdown Brain — On-device recall, plain files

> On-device recall, plain files (iPhone/iPad app by JTR Labs LLC.)

- Source: https://appshunter.io/ios/app/cortex-local-markdown-brain/id6785630809 (this page in markdown: same URL + `.md`)
- Developer: [JTR Labs LLC](https://appshunter.io/developer/1892768253)
- Category: Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.0 · 129 MB
- Languages: American English
- Released: 2026-07-14
- Data updated: 2026-08-27
- User reviews in markdown: https://appshunter.io/ios/app/cortex-local-markdown-brain/id6785630809/reviews.md

## What is Cortex?

Cortex is the iPhone and iPad companion to Cortex for Mac, already approved on this App Store record. It is an original local Markdown knowledge workspace built and maintained by JTR Labs.

DISTINCTIVE IOS INTEGRATIONS
- Save text and links from any app with the Cortex Share Extension.
- Create Cortex Note, Search Cortex, and Summarize Cortex Note with App Shortcuts and Siri.
- Keep the vault visible in Files as real Markdown files.
- Explore backlinks and a visual knowledge graph.
- Run semantic search and Recall entirely on device.

FREE
- Local Markdown vault, daily notes, backlinks, tasks, and canvas
- Keyword search and knowledge graph
- Import, backup, and export
- No account, ads, tracking, or cloud lock-in

CORTEX PLUS
- On-device semantic search and Recall
- Private insights across the vault
- On-device voice dictation and OCR
- End-to-end encrypted sync
- Unlimited attachments and storage

Your notes remain portable plain files. AI inference and embeddings run locally, so note content does not need to leave the device.

Terms of Use: https://www.jtrlabs.com/cortex/terms.html
Privacy Policy: https://www.jtrlabs.com/cortex/privacy.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Cortex Plus (Monthly) | $4.99 | per month |
| Cortex Plus (Yearly) | $39.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Cortex Believer | $99.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-08-26

No release notes.

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All apps by JTR Labs LLC: https://appshunter.io/developer/1892768253

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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 2026-08-27.*