CortexOS

CortexOS is the journal that learns who you are. Write or speak. CortexOS listens, understands your emotions, and gives you something no other journal can. Everything runs on your device. No cloud. No data harvesting. No one reads your words. Ever. EU AI Act compliant. NEW: PULSE Tap a mood, write a sentence, save. A 10-second check-in for busy days. Counts in every mood trend, never uses up your monthly free entries. YOUR AI GETS SMARTER OVER TIME Most journaling apps treat every entry like the first. CortexOS builds a private understanding of your patterns and growth. We call it Adaptive Intelligence. NEW: VENT & BURN A space for the heavy stuff. Speak or type. Nothing is saved unless you choose to keep it. Audio is securely wiped after transcription. When you're done, the entry burns. Nothing left, on your phone or anywhere else. DEEP ANALYSIS ON EVERY ENTRY After you write, an on-device LLM reads between the lines. It surfaces emotional patterns, cognitive habits, and growth you might not see yourself. Entries save instantly. The AI works quietly in the background. BEHAVIORAL PATTERNS CortexOS tracks the cognitive patterns and emotional rhythms in your writing over time. Rumination, self-compassion, stress responses, growth. Trend chips show what's emerging, fading, stable. Nothing gets labeled or diagnosed. Just named, so you can notice it yourself. SELF-AWARENESS CARD What CortexOS has learned about you. Themes, tendencies, cognitive habits, growth moments. Written entirely by the on-device AI. Visible only to you. AI REFLECTIONS Talk through what's on your mind by text or voice. The AI remembers your themes and asks questions that help you go deeper. Without judgment, without your words ever leaving your phone. VOICE JOURNALING Speak instead of type. WhisperKit transcribes on-device. No internet needed. INSIGHTS & PATTERNS Track 20+ emotions over days, weeks, and months. See mood trends, spot triggers, find connections between life events and how you feel. You decide what to do with them. CHAPTERS Every week becomes a chapter in your story. Auto-titled, themed, and summarized by AI from your entries. NEW: MIND WRAPPED A shareable card deck at entry milestones (25, 50, 100, 250, and beyond) and at year-end. Every card stamped with your entry count and "0 bytes sent anywhere". Share any card as an image. YEAR IN REVIEW Once a year, CortexOS turns your entries into the story of your year. Your emotional arc month by month, your chapters, your themes, the growth you might have missed. Built from your own words, on-device. SMART NOTIFICATIONS Your prompts and reminders aren't generic. They pull from what you've been writing about and the patterns CortexOS has noticed. 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, and stay put on the entry once they appear. A gentle prompt fades in when the page sits empty. THERAPIST REPORTS A shareable PDF of your emotional patterns and cognitive trends. No journal content included. Just the insights your therapist actually needs. PRIVATE BY DESIGN - AES-256-GCM encryption on every entry - Zero-knowledge cloud backup (we can't read your data) - Pattern history travels with you across device restores, end-to-end encrypted - On-device AI. Nothing sent to servers. - Screen recording, AirPlay, and mirroring blocked at the system level - No email, no password. Recovery phrase only. - Face ID / Touch ID - No tracking. No ads. No exceptions. Built by a solo developer founder in Malta, Europe. No investors, no ads, no data deals. A journal that is yours alone. Enhanced by AI. AI Disclosure: https://cortexos.app/ai-disclosure Trust Center: https://cortexos.app/trust Privacy Policy: https://cortexos.app/privacy Terms of Use: https://cortexos.app/terms Whitepaper: https://cortexos.app/whitepaper Your Mind, Encrypted.