Building Tools with Purpose
Personal apps designed to enhance productivity and enrich hobbies
Zin Flow
URL to EPUB Converter
Turn any web article, documentation, or blog post into a beautifully formatted EPUB ebook in seconds. Zin Flow intelligently extracts the main content, preserves formatting, and delivers a clean reading experience on Kindle, iPhone, iPad, and any EPUB-compatible device. Perfect for saving long reads, building a personal digital library, and reading offline — without distractions.
DownMark
Safari Web-to-Markdown Extension
Capture the web in pure Markdown. DownMark is a Safari extension that strips away ads, sidebars, and clutter — extracting only the main content and converting it to pristine Markdown. Perfect for developers, writers, and researchers building a knowledge base. All processing happens on-device, so your data never leaves your computer.
SubEnvoy
AI Subtitle Translation
Professional AI subtitle translation for local videos. On-device Whisper transcription, 10+ language support, privacy-first.
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.