Fulin Labs

Fulin Labs is Giovanni Fu Lin's independent software studio for language learning, link management, and creator publishing tools.

Every project below is a live, working product. Pick one to try it, or read the blog for build notes on how they’re made.

Choose the result you need

A free spaced repetition app for learning vocabulary.

Best for: Language learners who want a fast, focused way to build and retain vocabulary

A free Chinese reading app for any text.

Best for: Learners of Chinese who want a low-pressure, daily habit for building reading skills

Shorten, organize, and monitor links with safety checks.

Best for: Developers and marketers who need managed short links with real usage data and destination safety checks

Upload once, schedule everywhere.

Best for: Creators and small teams publishing short-form video across multiple platforms

Small, free tools for Chinese text, flashcard planning, links, and video. They run in your browser and need no account.

Count characters and see the HSK level of any Chinese text

See where a spaced repetition habit plateaus before you commit

Turn any link into a QR code, PNG or SVG

Build campaign URLs that attribute correctly