Sai — people & patterns
Map each relationship
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Register the people who matter, log what happened between you, and let AI analyze their traits, your patterns, and where things get stuck.
Why does that person drain you? AI-Powered Relationship & Psychology Diary, 'Sai'
It’s hard to understand why a different "you" comes out depending on who you're with, isn't it?
Sai is not just a standard mood tracker. It's a relationship and psychology diary where you record interactions with family, partners, coworkers, or friends, and our AI analyzes the underlying patterns in those relationships.
Why Choose 'Sai'?
Standard Diary Apps: Focus merely on "How did I feel today?"
Sai: Dives deeper into "Why did I react this way with this specific person?" to uncover the root context of your relationship dynamics.
Key Features
Register Relationships
Add the people you want to understand better. Categorize and manage them systematically by type (e.g., family, partner, boss, friend).
Record the Context
Log events, conversations, conflicts, and happy moments within the context of the relationship. The key is capturing the dynamic of the interaction, not just a list of feelings.
AI Relationship Analysis Report
As your entries build up, AI delivers an in-depth analysis report:
What kind of person they are (speech, behavior, communication style)
The overall nature of your relationship dynamic
Core reasons for frequent clashes or conflicts
Actionable steps to improve the relationship
Analyze Your Own Patterns
By grouping entries for a specific person, AI objectively analyzes "you in that relationship":
Your recurring behavioral patterns
Subconscious defense mechanisms
Specific trigger points you are overly sensitive to
Customized healing actions just for you
Warm, Comforting Messages
When human relationships weigh heavy on your heart, AI steps in to understand your situation and offers empathetic, sincere words of comfort.
Highly Recommended For:
Anyone feeling repeatedly exhausted by relationships with family, partners, or coworkers.
Those who often wonder, "Why do I only act like this around them?"
Individuals looking to view their relationships objectively, stepping back from overwhelming emotions.
People who want to understand another's psychology alongside their own reaction patterns.
Calmly untangle the complicated emotions between people with Sai.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Developer's Note Added: We’ve added a new 'Developer's Note' section to express our gratitude and share our thoughts with you. Thank you for using our app!
System Stability Improvements: Integrated Firebase settings and optimized the app to ensure a more stable and seamless performance.
The developer, HyunJun Moon, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- HyunJun Moon
- Size
- 51.9 MB
- Category
- Lifestyle
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 2 more
- English, Japanese, Korean
- Age Rating
13+
- 13+
- Infrequent
Medical Treatment information
Contains
Advertising
Health or Wellness Topics
- Copyright
- © 2026 moonshot