Comparison

CortexOS vs AI Journal

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CortexOS

Read full description

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. YOUR AI GETS SMARTER OVER TIME Most journaling apps treat every entry like the first. CortexOS builds a private Psyche layer: a living picture of your patterns, your people, and your growth. Now in its second generation, it ages like real memory: what keeps proving true grows stronger, what you've outgrown quietly fades. IT REMEMBERS WHAT MATTERS Mention something in a reflection and CortexOS can recall the moment you wrote about it months ago. Your journal becomes a memory that works for you. IT UNDERSTANDS THE MOMENT YOU'RE IN A job loss is not a bad mood. A new baby is not just "tired." CortexOS recognizes over 100 life situations and meets each one the way a thoughtful friend would: knowing what helps, and what never to say. IT LEARNS WHAT LIFTS YOU It notices what weighs on you and what reliably helps. Rate your sessions and it learns your taste. Your AI, shaped by you. 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. VENT & BURN A space for the heavy stuff. Speak or type. Audio is securely wiped after transcription. When you're done, the entry burns. Nothing left, anywhere. DEEP ANALYSIS ON EVERY ENTRY After you write, an on-device LLM reads between the lines: emotional patterns, cognitive habits, growth you might not see yourself. Entries save instantly. BEHAVIORAL PATTERNS Rumination, self-compassion, stress responses, growth. Trend chips show what's emerging, fading, stable. Nothing diagnosed. Just named, so you can notice it yourself. SELF-AWARENESS CARD What CortexOS has learned about you: themes, tendencies, what weighs on you, what helps. 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, replies faster than ever, and asks questions that take you deeper. Never judged, never uploaded. VOICE JOURNALING Speak instead of type. On-device transcription catches every word, even long, winding entries. No internet needed. INSIGHTS & PATTERNS Track 20+ emotions over time. Spot mood trends, triggers, and the connections between life events and how you feel. CHAPTERS Every week becomes a chapter in your story. Auto-titled, themed, and summarized by AI. MIND WRAPPED A shareable card deck at entry milestones and at year-end, every card stamped "0 bytes sent anywhere". YEAR IN REVIEW Your year, told from your own words: your emotional arc, your chapters, the growth you might have missed. Built on-device. SMART NOTIFICATIONS Prompts drawn from what you've been writing about. Like a quiet tap from someone who knows you. ENTRY ECHOES & GHOST TEXT Old entries resurface to remind you what you've already told yourself. A gentle prompt appears when the page sits empty. THERAPIST REPORTS A shareable PDF of your patterns and trends. No journal content included. Just what your therapist actually needs. PRIVATE BY DESIGN - AES-256-GCM encryption on every entry - Even the AI's memory is encrypted at rest - Zero-knowledge cloud backup (we can't read your data) - On-device AI. Nothing sent to servers. - Optional Deep Recall language pack: sharper memory, still 100% on your phone - Screen recording 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 in Malta, Europe. No investors, no data deals. A journal that is yours alone. 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 Your Mind, Encrypted.

About

AI Journal

This app transforms your recurring thoughts into visual art, daily insights, and weekly summaries. It helps you process complex emotions and mental patterns through writing and AI-generated imagery, fostering self-understanding.

Highlights
  • AI-generated paintings of thoughts
  • Daily insights from journal entries
  • Weekly reflection letters
  • Private gallery of inner life
  • Guided writing prompts
  • Focus on self-understanding
Read full description

Antena is an AI journal for overthinking. Write the thought you keep replaying. Antena gives it back as a painting, a daily insight, and a weekly letter that helps you see what your mind keeps circling. For the conversations you keep replaying. For the decisions that will not leave. For the feelings you cannot fully name yet. Antena helps you turn mental noise into words, images, and reflection so you can understand your inner life more clearly over time. WRITE WHAT IS ACTUALLY ON YOUR MIND Open Antena and start with the thought that is already there. No perfect answer to find. No need to make the feeling neat before you begin. Just write what keeps coming back. When you feel stuck, Go deeper helps you find the next place to write. RECEIVE A PAINTING OF YOUR THOUGHTS After each entry, Antena turns your writing into an original painting. The painting gives your inner world a visible form. It turns a private emotional moment into something you can see, remember, and return to. GET DAILY INSIGHTS Antena reads what you wrote and reflects it back with care. Your daily insight helps you notice what felt loud, what kept returning, what shifted, and what may have been underneath the surface. It is not advice. It is a clearer way to see your own writing. READ YOUR WEEKLY LETTER Over time, Antena brings your entries together. Your weekly letter connects the dots between separate days, revealing the themes, tensions, repeated questions, and emotional patterns running underneath the week. See what stayed with you. See what changed. See what your week was really carrying. BUILD A PRIVATE GALLERY OF YOUR INNER LIFE Every painting becomes part of your personal gallery. Over time, Antena becomes more than a diary. It becomes a visual record of your thoughts, moods, reflections, emotions, and the moments you were trying to understand. FOR PEOPLE WHO THINK DEEPLY Antena is for people who want more than a blank journal. For people who overthink. For people who replay conversations. For people who want a calmer, clearer daily reflection ritual. For people who want to understand what they feel before it becomes noise. Write honestly. See more clearly. Build a private ritual of attention, clarity, and self-respect. PRIVATE BY DESIGN Your journal entries, paintings, insights, and weekly letters are used to create your Antena reflections. You can delete your account from the app at any time. Antena is not therapy, coaching, diagnosis, medical advice, or crisis support. It is a journaling and reflection tool designed for mental health to help you understand yourself more clearly over time. SUBSCRIPTION AND PREVIEW Antena includes a Day 1 preview. Ongoing access to daily journal rituals, generated paintings, daily insights, weekly letters, gallery access, and purchase restoration requires an auto-renewing Antena Premium subscription purchased separately in the app. Subscriptions renew automatically unless canceled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings. Terms of Use: https://antenajournal.com/terms Privacy Policy: https://antenajournal.com/privacy

Screenshots

CortexOS4 screens
AI Journal4 screens

Verdict

The call

The clearest difference is rating: CortexOS at 5.0 against AI Journal's 3.5. CortexOS also leads on update cadence (every 5 days vs every 11 days) and iOS requirement (17.0 vs 26.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. CortexOS sells 3 in-app purchases, starting at $7.99 per month and AI Journal sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CortexOS holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

CortexOS ships an update every 5 days, AI Journal every 11 days. Both last shipped on October 24, 2026.

Scorecard3 real differences · 7 level
CortexOS versus AI Journal: the parameters behind the verdict, then further details
ParameterCortexOSAI Journal
PriceFreeFree
Rating5.0 (1 ratings) — better3.5 (2 ratings)
Positive reviews—0.0% of reviews
Number of ratings12 — better
Update frequencyEvery 5 days — betterEvery 11 days
AdsNoNo
In-app purchasesYesYes
Monetization—Subscription
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better26.0
Further details — not scored
Size32 MB39 MB
Age rating4+4+
DeveloperOrlin Ralinov MartinovMANTAS POVILAITIS

In-app purchases

3 purchases

CortexOS

Subscriptions2
  • Premium Monthly7 Days trial$7.991 Month
  • Premium Yearly7 Days trial$49.991 Year
One-time1
  • Lifetime Access$99.99
4 purchases

AI Journal

Subscriptions4
  • Antena Premium Monthly$9.991 Month
  • Antena Premium Monthly$12.991 Month
  • Antena Premium Annual7 Days trial$59.991 Year
Show 1 more
  • Antena Premium Annual$99.991 Year

Questions

Is CortexOS free?
CortexOS is free to download, with in-app purchases available.
Is AI Journal free?
AI Journal is free to download, with in-app purchases available.
Which has better reviews, CortexOS or AI Journal?
CortexOS is rated higher. CortexOS averages 5.0 out of 5 from 1 ratings, while AI Journal averages 3.5 from 2 ratings.
Do CortexOS or AI Journal have ads?
Neither CortexOS nor AI Journal shows ads.
Which is updated more often, CortexOS or AI Journal?
CortexOS ships an update every 5 days, and AI Journal every 11 days. Most recently, CortexOS was updated on October 24, 2026 and AI Journal on October 24, 2026.

Other comparisons