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CortexOS vs PrimeTask

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

CortexOS compared with PrimeTask
DetailCortexOS logo CortexOSPrimeTask logo PrimeTask
What it doesThe zero-knowledge AI journal with on-device AI that reads what you wrote and reflects on it, keeping your words on your phone. The productivity system that's yours forever
StageStartup Not given
FoundedNot given Not given
Based inMT Not given
Pricing modelFreemium Not given
PricingFree: 10 encrypted entries per month. Premium Monthly: $7.99/month. Premium Annual: $49.99/year. Lifetime: $99.99 one-time purchase. All paid plans include a 7-day free trial. Standard: €69 one-time for 2 devices; Pro: €139 one-time for 4 devices. 14-day free trial with full Pro access, no credit card required.
Key features
  • On-device Llama 3.2 language model with no cloud calls
  • 20+ emotion detection with intensity scoring
  • Deep Analysis: multi-paragraph AI reflections connecting to past entries
  • Cognitive distortion alerts based on CBT principles
  • On-device voice transcription with OpenAI Whisper
  • Zero-knowledge cloud vault with AES-256-GCM encryption
  • Memory layer that learns your patterns over time on-device
  • Behavioral pattern detection and cognitive pattern naming
  • 7-day chapters that automatically organize journaling into narrative arcs
  • Therapist PDF reports for sharing with mental health professionals
  • Natural language task input with date, project, priority, and contact parsing
  • Multiple task views: List, Board, Calendar, Gantt, and Day Planner
  • Project management with goals, milestones, health tracking, and progress context
  • PrimeFlow visual canvas for mind mapping and task/contact visualization
  • Focus Mode with Pomodoro timers and session tracking
  • PrimeCRM for contacts, companies, deal pipelines, and relationship tracking
  • Custom fields with rollups and financial summaries
  • Local automations with trigger-condition-action rules and no caps
  • AI integration via MCP with 100+ local tools
What makes it different
  • Only journaling app combining zero-knowledge encryption with on-device AI analysis
  • Open-source cryptographic core published under MIT license on GitHub
  • AI runs entirely on-device with zero network calls for data processing
  • Recovery phrase creates permanent data deletion if lost, proving zero-knowledge works
  • Offline-first architecture means everything works without internet connection, by design not fallback
  • Local data ownership with open JSON format and no server dependency
  • One-time purchase with no recurring costs or subscription extraction model
  • Privacy by architecture with no telemetry, tracking, or analytics
  • Unified system combining tasks, projects, CRM, calendar, and visual planning in one app
Free planNot given Not given
Open sourceNot given Not given
PlatformsNot given Not given
Public APINot given Not given
Community votes00
DR (Domain Rating by Ahrefs)15 +3 (up) since last check12 no change since last check
Trust Flow (Majestic)95
Citation Flow (Majestic)2025
Referring domains (Majestic)1732

4 details filled in for both companies.

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