CortexOS

Your private AI mood journal

Only for iPhone

Free · In‑App Purchases

iPhone

Write. Reflect. Notice your patterns. A private journal that helps you understand who you are becoming. CortexOS is the journal that learns who you are. Write or speak. CortexOS listens, understands your emotions, and gives you back something no other journal can. Everything runs on your device. No cloud. No data harvesting. No one reading your words. Ever. EU AI Act compliant. 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. Every reflection gets more personal the longer you journal. We call it Adaptive Intelligence. 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 does its work quietly in the background. BEHAVIORAL PATTERNS CortexOS tracks the cognitive patterns and emotional rhythms in your writing over time. Things like rumination, self-compassion, stress responses, growth moments. Trend chips show you what's emerging, what's fading, what's stable. Nothing gets labeled or diagnosed. Just named, so you can notice them yourself. SELF-AWARENESS CARD What CortexOS has learned about you. Themes, tendencies, cognitive habits, growth moments. Built from your own words. Visible only to you. AI REFLECTIONS Talk through what's on your mind by text or voice. The AI remembers your themes, knows your patterns, 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 your voice entirely on-device. No internet needed. INSIGHTS & PATTERNS Track 20+ emotions over days, weeks, and months. See mood trends, spot triggers, and find the connections between life events and how you feel. CortexOS surfaces the patterns. 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. YEAR IN REVIEW Once a year, CortexOS turns your entries into a full story of the year you lived. Your emotional arc month by month, your chapters, your themes, the growth you might not have noticed in the moment. Built from your own words, written on-device. SMART NOTIFICATIONS Your reflection prompts and reminders aren't generic. They pull from what you've actually been writing about and the patterns CortexOS has noticed. 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. A gentle prompt fades in when the page sits empty. Small touches that make journaling a habit instead of a chore. THERAPIST REPORTS Generate 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) - Your pattern history travels with you on device restores, still end-to-end encrypted - On-device AI. Nothing sent to servers. - 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. Just 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 Technical Whitepaper: https://cortexos.app/whitepaper Your Mind, Encrypted.

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You asked for quiet, you got it. Two new toggles in Settings let you mute in-app sounds and haptics independently. Splash sound stays as a brief launch moment. Everything else goes silent when you want. Your AI model now stays exactly where you left it. No surprise downloads at launch or in the background. Pick Standard or Enhanced once, and that's what runs. Notifications now stop at the lock screen. Tapping one requires Face ID, Touch ID, or your PIN, even if you just had the app open. Notifications are a separate door into your journal, and we don't assume a tap is you.

The developer, Orlin Ralinov Martinov, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    • Orlin Ralinov Martinov
    Size
    • 31.7 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    Languages
    • English
    Age Rating
    9+
    In-App Purchases
    Yes
    • Lifetime Access $99.99
    • Premium Yearly $49.99
    • Premium Monthly $7.99
    Copyright
    • © 2026 Orlin Martinov