CortexOS

CortexOS is the journal that learns who you are.

Write or speak. CortexOS listens, understands your emotions, and gives you real insight into how you think, feel, and grow. Everything runs on your device. No cloud. No data harvesting. No one reading your words. Ever.

YOUR AI GETS SMARTER OVER TIME Most journaling apps treat every entry like the first. CortexOS builds a private understanding of your emotional patterns, tendencies, and growth. Every analysis and reflection gets more personal the longer you journal. We call it Adaptive Intelligence.

DEEP ANALYSIS After you write, an on-device LLM reads between the lines. It surfaces emotional patterns, cognitive habits, and growth you might not see. A mirror that notices what you'd miss.

BEHAVIORAL PATTERNS CortexOS tracks cognitive patterns and emotional rhythms over time. Rumination, self-compassion, stress responses, growth moments. Nothing gets diagnosed. Just named, so you can notice them yourself.

SELF-AWARENESS CARD A running picture of what CortexOS has learned about you. Your themes, tendencies, habits, growth moments. Built from your own words. Visible only to you.

AI REFLECTIONS Talk through what's on your mind with a private AI companion, by text or voice. It remembers your themes and asks the kind of questions a good therapist would. Without judgment, without a bill, without your words ever leaving your phone.

VOICE JOURNALING Speak instead of type. WhisperKit transcribes your voice entirely on-device.

INSIGHTS & PATTERNS Track 20+ emotions over days, weeks, months. See mood trends, spot triggers, find connections between life events and how you feel.

CHAPTERS Every week becomes a chapter in your story. Auto-titled, themed, and summarized by AI from your entries.

YEAR IN REVIEW Once a year, CortexOS turns your entries into a full story of the year you lived. Your emotional arc, your chapters, the growth you might not have noticed in the moment.

SMART NOTIFICATIONS Prompts that pull from what you've actually been writing about. Nudges that feel like a quiet tap from someone who knows you.

ENTRY ECHOES & GHOST TEXT Old entries bubble up to remind you what you've already told yourself. Small touches that make journaling a habit instead of a chore.

THERAPIST REPORTS A shareable PDF of your emotional patterns and cognitive trends. No journal content. Just the insights your therapist needs.

PRIVATE BY DESIGN AES-256-GCM encryption on every entry Zero-knowledge cloud backup (we can't read your data) On-device AI. Nothing sent to servers. No email, no password. Recovery phrase only. Face ID / Touch ID No tracking. No ads. No exceptions.

CortexOS isn't a diary with a lock. It's an AI that understands you and answers only to you.

Privacy: https://cortexos.app/privacy Terms: https://cortexos.app/terms

Built by a solo developer founder in Malta, Europe. No investors, no ads, no data deals. Just a journal that is yours alone, enhanced by AI.

Your Mind, Encrypted.