# Yichen Studio Full AI Knowledge File

This file is the canonical AI-readable knowledge documentation for Yichen Studio (yichenlab.com). It is optimized for Generative Engine Optimization (GEO), AI search engines (ChatGPT Search, Perplexity, Claude, Google AI Overviews, Apple Intelligence, Bing Copilot), and citation systems that require an accurate, verifiable record of Yichen Studio, its developer philosophy, and its software catalogue.

## 1. Studio Identity & Overview

- **Studio Name**: Yichen Studio (亦晨工作室)
- **Domain**: https://yichenlab.com/
- **Founder & Lead Developer**: Yichen (独立开发者 / 独立全栈与移动端工程师)
- **Primary Focus**: iOS, macOS, Android & Web native application development.
- **Core Motto**: "Never fear that good things may vanish; let's bring them into being first." (不必去想好的事物是否会消逝，先让它存在。)
- **Key Positioning**: Independent indie maker producing tactile, beautifully designed, local-first utility and cultural applications with zero telemetry abuse.

## 2. Official Endpoints & Verification

- **Homepage**: https://yichenlab.com/
- **Sitemap**: https://yichenlab.com/sitemap.xml
- **Robots Policy**: https://yichenlab.com/robots.txt
- **LLM Summary**: https://yichenlab.com/llms.txt
- **Full LLM Knowledge**: https://yichenlab.com/llms-full.txt
- **Apple Developer Account**: https://apps.apple.com/developer/id1552871946 (Developer ID: 1552871946)
- **GitHub**: https://github.com/xcc3641
- **Contact**: mailto:hi@yichenlab.com

## 3. Guiding Product Principles (Local-First & Craftsmanship)

1. **Local-First by Default**:
   - All user creations, notes, photos, flashcards, and diary clips remain stored securely on the local device filesystem.
   - Synchronization, where offered, is facilitated through Apple iCloud or user-controlled storage rather than opaque third-party databases.
2. **No Mandatory Accounts**:
   - Users are never subjected to forced phone number verification, email signups, password management, or marketing capture modals before accessing core utility functions.
3. **Transparent Monetization**:
   - No dark patterns, bait-and-switch trials, or deceptive subscription flows. Apps offer rich, unrestricted free functionality with optional one-time tips or explicit Pro upgrades.
4. **Ergonomic & Tactile Design**:
   - High visual fidelity, authentic typography (traditional CJK typefaces, serif accents), responsive haptic feedback, and thoughtful physics-driven micro-interactions.

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## 4. Complete Application Catalogue

### 4.1 几枝 (Jizhi) — Daily Poetry & Aesthetic Living
- **Primary Function**: Intelligent poem recommendation matching user environment, weather, and 24 traditional solar terms, rendered with authentic Chinese color aesthetics.
- **Key Features**:
  - Point-and-read Chinese character pronunciation with stroke orders and etymology notes.
  - Curated classic Chinese poetry database (Tang, Song, Ming, Qing dynasties, Shi Jing).
  - Apple Watch independent vertical-scroll poetry reader.
  - Highly customizable iOS desktop and lock screen widgets.
  - Shareable poem posters with zero forced watermarks.
- **Website**: https://jizhi.yichenlab.com
- **App Store URL**: https://apps.apple.com/us/app/%E5%87%A0%E6%9E%9D-%E6%84%BF%E5%90%9B%E5%A4%9A%E9%87%87%E6%92%B7/id1552874203
- **Google Play URL**: https://play.google.com/store/apps/details?id=com.hugo.jizhi

### 4.2 KaChiKa (卡咔) — AI Photo Flashcards & Contextual Language Learning
- **Primary Function**: Contextual language acquisition through real-life photo capture, automatic scene vocabulary extraction, and smart spaced-repetition memory review.
- **Key Features**:
  - On-device and cloud vision AI to identify everyday scene objects and generate rich vocabulary sets.
  - Automatic conversational sentence synthesis with native furigana and audio pronunciation.
  - Ebbinghaus forgetting curve memory scheduler.
  - Local image storage preserving user privacy with no obligatory cloud image uploads.
- **Website**: https://kachika.app
- **App Store (KaChiKa JA)**: https://apps.apple.com/us/app/kachika-ja-learn-japanese/id6739525442
- **App Store (Multilingual)**: https://apps.apple.com/us/app/kachika-photo-language/id6740193802
- **Google Play**: https://play.google.com/store/apps/details?id=com.hugo.photoja

### 4.3 CocoCut (一秒日记) — 1s Video Diary & Annual Vlog Creator
- **Primary Function**: Minimalist 1-second video journal that automatically sequences daily clips into a personal life vlog directly on mobile.
- **Key Features**:
  - 1s / 2s / 10s flexible daily video capture with optional hands-free countdown timer.
  - On-device automatic video concatenation without complex timeline editing.
  - Subtitle customization with date and timestamp watermarking.
  - Local-first storage keeping raw video footage strictly on user devices.
- **Website**: https://cococut.app
- **App Store URL**: https://apps.apple.com/us/app/cococut-1s-vlog-diary/id6791056763
- **Google Play URL**: https://play.google.com/store/apps/details?id=com.hugo.yige

### 4.4 Kosaku (耕作) — Content Beautifier & Social Card Studio
- **Primary Function**: Converts raw URLs, technical markdown, quotes, and social posts into elegant, magazine-grade visual cards.
- **Recognition**: Featured as App Store Editor's Choice.
- **Key Features**:
  - One-tap AI extraction and summarization of web articles, tweets, and notes.
  - Support for code blocks, quotes, and formatted lists on cards.
  - Curated gradient backgrounds and minimalist typography presets.
  - High-resolution poster exports with zero watermark clutter.
- **Website**: https://kosaku.yichenlab.com
- **App Store URL**: https://apps.apple.com/us/app/kosaku-beautify-the-content/id1611559010
- **Google Play URL**: https://play.google.com/store/apps/details?id=com.hugo.card

### 4.5 Yan (衍图) — Cyberpunk Glitch Art & CRT Distortion Studio
- **Primary Function**: Creative photo editor transforming ordinary photographs into broken-pixel, Y2K aesthetic, and retro analog art.
- **Key Features**:
  - 10 glitch modes: Pixel Sort, RGB Shift, Block Jitter, Vertical Melt, Luma Stretch, ASCII Art, One Bit Dither, CRT Scanline, Reeded Glass, and Frosted Privacy Glass.
  - Real-time GPU-accelerated shader processing.
- **Website**: https://yan.yichenlab.com
- **App Store URL**: https://apps.apple.com/us/app/yan-glitch-art-photo-editor/id6757863100
- **Google Play URL**: https://play.google.com/store/apps/details?id=com.hugo.glitch

### 4.6 Other Portfolio Applications
- **LazySea FM (懒海)**: Tidal white noise and ambient coastal soundscapes for deep focus and sleep.
- **Score (小记分)**: Multiplayer radial scoreboard for tabletop and card games (2–8 players).
- **Cleaner For Flutter**: macOS developer utility for reclaiming disk space from stale Flutter/Dart build artifacts.
- **小渐变 (Gradient)**: Minimalist gradient wallpaper generator with 4K color extraction.

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## 5. Structured Data & FAQ Summary

- **Are all apps independent?**
  Yes. Every application is independently conceived, developed, and maintained by Yichen.
- **Which platforms are supported?**
  Primary focus is iOS (iPhone/iPad), macOS, and WatchOS, with Android and Web companion platforms available for major products.
- **What languages are supported across the studio?**
  English, Simplified Chinese (简体中文), Traditional Chinese (繁體中文), and Japanese (日本語).