I run Fulin Labs, a one-person studio that ships small, focused web apps. Here is what is live today and the problem each one solves.
HSK Studio — https://hsk.fulinlabs.com
A study app for the HSK Chinese exam: vocabulary lists by level, flashcards with spaced repetition, and a Chinese text analyzer that shows which words in any passage are above your HSK level.
Fulin Flashcard — https://flashcard.fulinlabs.com
A fast flashcard app for any subject. Create decks, review with spaced repetition, no clutter.
ShortLink — https://s.fulinlabs.com
A short-link tool with UTM builder and click analytics, for people who share links on social bios, newsletters and campaigns.
SchedulePost — https://schedulepost.fulinlabs.com
Schedule Instagram Reels, TikTok and other short videos from one queue. So far it has published over a thousand posts, and I write up the failures openly because that is where the interesting engineering lives.
Free tools and guides
Study guides, a UTM builder and other free tools live at https://fulinlabs.com. If you use any of the apps, I would love feedback on what is missing.
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