CortexOS - Zero-Knowledge AI Journal

CortexOS is a unique journaling app designed for iPhones that prioritizes your privacy above all else. It's built with a zero-knowledge architecture, meaning all your thoughts, emotions, and data are processed and stored directly on your device. The app's servers never see your entries, ensuring your personal reflections remain completely confidential. CortexOS offers a free experience with options to unlock more features through in-app purchases.

Benefits

CortexOS offers several key advantages for users. Its zero-knowledge design means your journal entries are encrypted on your device, and even cloud backups are unreadable by the server. The AI features run locally, so your words never leave your phone. You can journal using text or voice, with voice entries transcribed privately on your device. The app can analyze over 20 emotions in your writing, helping you understand your feelings better. You can also have private conversations with an AI that reflects on your journal history, all processed locally. An insights dashboard visualizes your mood trends and emotional patterns over time, and the app organizes your journaling into 7-day chapters with summaries. For those working with a therapist, CortexOS can generate PDF reports of your emotional patterns and habits without revealing the specific journal content.

Use Cases

CortexOS is ideal for anyone who wants to journal regularly while keeping their thoughts and feelings completely private. It's useful for tracking your emotional well-being, identifying patterns in your moods, and understanding how different events affect your feelings. The AI reflection feature can help you explore recurring themes or unresolved emotions. The app is also beneficial for individuals who want to share insights about their emotional state with a therapist in a summarized, privacy-focused format. It requires iOS 17.0 or later and is available in English.

Pricing

CortexOS offers several subscription options: Cortex Deep Monthly for $9.99 per month, Cortex Deep Yearly for $79.99 per year, and a Cortex Ultra Lifetime purchase for $199.99. All options include a 14-day free trial. Subscriptions automatically renew unless canceled at least 24 hours before the current period ends.

Vibes

Users can expect a journaling experience where their privacy is paramount. The app emphasizes that it does not track users or display ads. All processing and data storage are designed to keep personal information secure on the user's device.

Additional Information

The developer, Orlin Ralinov Martinov, has stated that the app does not collect any data. CortexOS is categorized under Health & Fitness and has an age rating of 9+.