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Orlin Martinov

Orlin Martinov

Founder, CortexOS.

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CortexOS - Private AI Journal

CortexOS - Private AI Journal

Mental-health

Privacy-sensitive journaling stops feeling like an oxymoron once CortexOS is in your pocket. The app speaks squarely to anyone whose diary carries real emotional weight—mental-health trackers, therapy students, individuals under legal or personal threat—yet winces at uploading raw thoughts to external servers. Its blunt thesis is that the only trustworthy steward of your psyche is the phone already in your hand. CortexOS encrypts every entry with AES-256-GCM and locks the key behind a six-word recovery phrase generated locally during installation. Because the phrase produces keys through Argon2id on-device, the developer cannot reproduce it even when served a warrant or data request. The same isolation philosophy powers an impressive technical feat: Meta’s Llama 3.2 language model—either 1 B or 3 B parameters—runs entirely within the app, slicing prompts and producing summaries without a single packet crossing the network. That means reflection, weekly chapter analysis, and 20-point emotion classification happen on silicon you control, not in some distant GPU farm. A Whisper-based speech engine follows the same rule: speak into the microphone and the transcription never leaves the handset, supporting 99 languages and demanding zero cloud credits. The intelligence glows brighter because it feeds solely on your corpus. Each entry contributes to a living psychological profile; the AI highlights persistent cognitive distortions, charts mood against daily variables, and can export a clinician-ready PDF report stripped of any raw text. A still-optional encrypted cloud vault syncs ciphertext blobs that even the company’s servers treat as opaque, preserving offline-first peace of mind whenever you prefer it. Crucially, the company never dangles paywalls over the core promise: the full on-device LLM and zero-knowledge encryption ship to every user on day one. Revenue talk is absent from the pitch, making the product feel less like a trial and more like a manifesto delivered in code. If journals are the R&D lab of the self, CortexOS finally treats that research as classified material—and keeps the clearance level where it belongs.

privacy ai journal mood tracker
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