JLPT Mastery
Adaptive JLPT preparation for all 5 levels. Confusion tracking, spaced repetition, and AI explanations across 8,700+ vocabulary words and 489 grammar patterns.
Added April 24, 2026
· Last analysed April 24, 2026 · via 
· 78% unique tagline
StackScope is a free public catalogue of indie launches. We find launches on Product Hunt, Hacker News and similar feeds, then crawl each site to detect its tech stack and score it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 24 April 2026; the live site may have changed since.
JLPT Mastery scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: no Content-Security-Policy, tracking cookies set before any opt-in, and incomplete email security.
Launched on Product Hunt on April 24, 2026. The site is hosted on Vercel, with a domain registered 9 weeks before launch. We've detected 11 technologies on this site, covering analytics, CSS frameworks, DNS providers, and email forwarding. The stack includes Next.js, React, and Tailwind CSS.
It's on one of the most common stacks we track, shared by 10,672 launches and more locked down than the typical Product Hunt launch.
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Tech Stack (11)
| DNS |
Cloudflare DNS
|
| Hosting |
Vercel
(2)
|
| Security | HSTS (2) |
| Email forwarding |
Cloudflare Email Routing
(2)
|
| Transactional email |
Resend
|
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| Meta-framework |
Next.js
(3)
|
| UI library |
shadcn/ui
|
| Analytics |
Google Analytics
(3)
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Storage (2)
| Name | Lifetime | Detected as |
|---|---|---|
| _ga | 1y | Google Analytics |
| _ga_F1GCPT81T3 | 1y | Google Analytics |
Readiness Breakdown How?
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI CSS signals | +15 |
| AI copy signals | +5 |
| AI onboarding signals | +5 |
| AI palette signals | +5 |
| AI stack signals | +10 |
This score is based on structural patterns and is not definitive. Many legitimate sites may trigger signals, and AI-built sites may go undetected. It should be treated as an indicator, not a verdict.