Building Tools with Purpose
Personal apps designed to enhance productivity and enrich hobbies
SubEnvoy
AI Subtitle Translation
Professional AI subtitle translation for local videos. On-device Whisper transcription, 10+ language support, privacy-first.
Zin Flow
URL to EPUB Converter
Transform web content into beautifully formatted e-books. Simply input a URL and Zin Flow will automatically extract and convert content to EPUB format for comfortable reading on any compatible device.
DownMark
Safari Web-to-Markdown Extension
A Safari browser extension designed for knowledge management, intelligently extracting main web content and converting it to high-quality Markdown files. Completely local processing ensures privacy and security.
Zin Feed
RSS to EPUB Converter
Transform your RSS feeds into beautifully formatted EPUB and PDF e-books. Perfect for Kindle and other e-readers with flexible grouping options - create daily, monthly, or yearly reading collections from your favorite RSS content.
Yist
GitHub Gist Manager
Seamlessly manage your GitHub Gists with local sync support. Create, edit, and organize your code snippets, use collections, and enjoy syntax highlighting and draft support.