Comparison

CortexOS vs Overthink Less

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

Head to head
About

CortexOS

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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

Overthink Less

Features
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Overthink Less is a free, no-account calm toolkit for the moments your mind won't slow down. Tap "I'm overthinking right now" and go straight into a rescue flow โ€” a fast 60-second reset, 5-4-3-2-1 grounding, or a hand-on-chest pause for the hardest moments. No sign-up, no profile, nothing to configure. You open the app and you're already being helped. Breathe, ground, and sleep with guided sessions built for real life. Box breathing and 4-7-8 help you slow down. Barefoot grounding and body scan sessions help you get out of your head and back into the room. A night wind-down, a pre-sleep breath, and Quiet the 2am Mind are there for late-night loops. Situation packs group the right session to the right moment โ€” a spiraling decision, a conversation on replay, or a workday that won't switch off. Optional voice guidance walks you through each one. See yourself getting steadier. Before you start, note how intense the overthinking feels; after, note it again โ€” the app shows you the shift and keeps a private progress dashboard of your calmer moments over time. All of it lives only on your device. There are no accounts, no logins, and nothing tied to your identity. The core toolkit is free and works without ads. Deeper and situation-specific sessions sit behind an optional Calm Pass โ€” watch one short rewarded video and the extended library opens for 24 hours. Ads are non-personalized and we never ask to track you across other apps. If something bigger is going on, the app always points you to real support resources.

Screenshots

CortexOS4 screens
Overthink Less4 screens

Verdict

The call

The clearest difference is device support: Overthink Less at 3 against CortexOS's 1. Overthink Less also leads on iOS requirement (15.0 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. CortexOS sells 3 in-app purchases, starting at $7.99 per month and Overthink Less sells 2 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

CortexOS ships an update every 5 days, Overthink Less weekly. The most recent releases landed on August 23, 2026 and September 17, 2026 respectively.

Scorecard2 real differences ยท 4 level
CortexOS versus Overthink Less: the parameters behind the verdict, then further details
ParameterCortexOSOverthink Less
PriceFreeFree
Update frequencyEvery 5 days โ€” betterWeekly
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, iPod โ€” better
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size32 MB72 MB
Age rating4+4+
DeveloperOrlin Ralinov MartinovNissim Shon Baranes

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
2 purchases

Overthink Less

Subscriptions2
  • Overthink Less Premium Monthly$6.991 Month
  • Overthink Less Premium Annual7 Days trial$39.991 Year

Questions

Is CortexOS free?
CortexOS is free to download, with in-app purchases available.
Is Overthink Less free?
Overthink Less is free to download, with in-app purchases available.
Do CortexOS or Overthink Less have ads?
Neither CortexOS nor Overthink Less shows ads.
Which is updated more often, CortexOS or Overthink Less?
CortexOS ships an update every 5 days, and Overthink Less weekly. Most recently, CortexOS was updated on August 23, 2026 and Overthink Less on September 17, 2026.

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