PureCodex: Notes by Life Area

Notes work like memory. A short note goes into a capture stream first, the way short-term memory holds what just happened. Later you file it into a life area, such as home, work, health or study. There it becomes long-term knowledge. One note can belong to several areas, and it shows up in each of them. Every note is a plain Markdown file in a folder you choose. You write first and decide where it goes later. The answer can be more than one place. Documents work the same way: scan a page with the camera, and it goes into a Documents area and into the area you scanned it from. WRITE NOW, FILE LATER • A capture bar at the bottom of the screen takes a note in one line. • Mark each note To do, To know or To library. The stream has search, filters and pinning. • Move to hub turns a note into a wiki item inside an area. • Scan, take a photo or attach a file straight into a quick note. • A Home Screen and Lock Screen widget opens the bar with the keyboard up. YOUR NOTES ARE .MD FILES, AND THEY'RE YOURS • Every note is a plain Markdown (.md) file in a folder you pick, on the device or in iCloud Drive. • Open, edit or back them up with any editor. They stay readable without PureCodex. • No account, no server, no analytics. The app makes no network requests. • Locked areas are the exception: their files are encrypted, and only PureCodex opens them. • Free, with no in-app purchases. LIFE AREAS INSTEAD OF FOLDERS • Each area holds its own items and sub-areas, up to three levels. • An item has one home area and can be added to others. It is listed in every area it belongs to. • It stays one Markdown file. The areas are written in the file itself. SCAN DOCUMENTS • Scan a page with the camera and it is found and straightened, or attach a PDF or photo. • Each document is an item in a Documents area, and it also shows in the area you scanned it from. • Text in English documents is recognized, kept in the item and searchable. A date and an amount are suggested from it. • Add pages to a document later, or open it in another app. LOCKED AREAS • Encrypt an area with a password, on the device: XChaCha20-Poly1305, with the key derived by Argon2id. • Unlock with Face ID. A one-time recovery code is shown when you create it. • Locks again after an idle time you choose, or when the app goes to the background. • Move existing notes in, and they are encrypted, with the photos and PDFs they attach. READY FOR AI AGENTS (OKF) OKF is an open format for knowledge: a folder of Markdown files that people and AI agents can both read. Each item says what kind of claim it is — a fact, a how-to, a decision, a passing note — so an agent knows how far to trust it. • Open your library in an AI agent of your choice. It can answer from your notes and point to the item each answer came from. • A contract file in the folder tells the agent what it may write: summaries as separate items that list their sources, never edits to what you wrote. • Every folder gets a table of contents, and links update when an item moves. • The app has no AI built in. Sensitive notes belong in a locked area, which an agent sees only as encrypted data. HEBREW AND ENGLISH ON THE SAME PAGE Every line takes its direction from its own first letter, so mixed Hebrew and English notes read correctly. The interface is in English and Hebrew. ALSO • Live-preview editor: tables, math (KaTeX), Mermaid diagrams, callouts, footnotes, task lists. • Links, backlinks, and embedding one note inside another. • Search the whole text of every item, from the top of the home screen. • Take a photo or attach an image or PDF to a note.