Allen's profile on Product Hunt

About

I'm Jin, the founder and developer behind FiveUp Club. With over 9 years of iOS development experience, I'm passionate about creating educational tools that genuinely impact how people learn and grow. I designed and developed FiveUp using Flutter to explore the limits of human computational speed, and expanded into AI-powered learning with SnapQuizX to address the challenge of knowledge retention from web content. As a solo developer, I handle everything from concept to code, always driven by user feedback and the goal of making learning more effective and enjoyable. Your insights and experiences with our tools directly shape their evolution.

Links

CinematicFlow

Web Site

Twitter

Badges

Tastemaker

Gone streaking 10

Gone streaking

Gone streaking 5

Maker History

ClearBaZiFree BaZi and zodiac calculators that flag tricky births
Oct 2026
MarginDeckSee which products deserve your next month
Aug 2026
CinematicFlowOptimize prompts for Seedance, Sora & Runway. Save credits.
Feb 2026
TakaQuizTurn your notes, PDFs and web pages into practice quizzes
Jul 2025

🎉

Joined Product HuntJuly 2nd, 2025

Forums

•

1mo ago

ClearBaZi - Free BaZi and zodiac calculators that flag tricky births

Free Chinese astrology calculators (BaZi, zodiac, lunar calendar, Kua) that use true solar time and historical DST, and tell you when a birth sits near a calendar boundary instead of guessing. No sign-up.

•

3mo ago

MarginDeck - See which products deserve your next month

MarginDeck is a local-first Mac app for indie developers. Split shared costs across products, compare estimated contribution profit, and review upcoming scheduled costs before they pile up—without becoming accounting software.

•

9mo ago

CinematicFlow - Optimize prompts for Seedance, Sora & Runway. Save credits.

Stop wasting credits on failed AI video generations. CinematicFlow is a 6-step prompt builder for Seedance 2.0, Runway, Kling, Sora & Luma. Each step covers: Subject, Background, Style, Framing, Camera Motion & Model — generating prompts tuned to each platform. ✦ 24 visual styles, 15 camera motions, 14 compositions ✦ Seedance bilingual prompt support (EN/ZH) ✦ Professional cinematography language ✦ No subscription — buy once, use forever 3 free credits at signup.