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Spin Lab

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Hey HN, I built Spin Lab: a browser-based interactive explainer for table-tennis spin. It visualizes topspin/backspin, spin rate, ball trajectory, bounce behavior, and why the opponent’s return reacts the way it does. I built it because spin is central to table tennis, but most explanations are either too hand-wavy or too static.Thanks Fable, we miss you

HN · launched Jun 16, 2026 · 44 upvotes (top 17%) · 0 views

Niche: scientific and system simulation software · 74 launches, 2 in the last 7 days · Explore this niche →

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More like this: all 74 launches in scientific and system simulation software →

Could you build this?

Yes Spin Lab is an educational, browser-based 3D physics explainer built with Three.js and standard aerodynamic equations (Magnus effect). Vibe coding handles interactive WebGL simulations and step-by-step explanatory UI exceptionally well.

Discussion

20 comments analyzed.

Competitors mentioned: Nittaku balls, DHS balls

Concerns raised: UI doesn't work well on mobile devices, Angle selection limited to 5° increments instead of fine-grained control, AI-generated text feels inauthentic, Bounce calculation appears incorrect for backspin push shots, Lacks classification table for spin results

Feature requests: Show multiple ball types simultaneously for bounce comparison, Finer angle adjustment below 5° increments, Include air density and ball material variations in simulation, Fix backspin push shot physics calculations

Competitors

Other products that read as similar to this one : 108 launches clear the similarity bar, closest 8 shown.

Attention rank: #13 of 109 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).

Launched 228 days after the earliest competitor.

  • SpinStreak · ph · 2026-09-07 · 1 upvotes · similarity 0.52
  • Smashpoint · ph · 2026-09-25 · 1 upvotes · similarity 0.41
  • Spin · ph · 2026-10-24 · 2 upvotes · similarity 0.41
  • SpinOfLuck · ph · 2026-09-11 · 2 upvotes · similarity 0.40
  • Spin · ph · 2026-10-29 · 1 upvotes · similarity 0.39
  • WheelSpinFree · ph · 2026-10-14 · 1 upvotes · similarity 0.39
  • Chess Studio · ph · 2026-10-31 · 2 upvotes · similarity 0.39
  • Spin The Wheel 3D · ph · 2026-09-28 · 2 upvotes · similarity 0.39

Related data

The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.