Kanjidon
The app that revolutionizes how you learn Japanese kanji. Smart quizzes, PvP battles, and SRS system. From beginner to JLPT N1.
Estimated origin: Italy
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· Added June 28, 2026
· Last analysed June 28, 2026 · via 
· 71% 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 28 June 2026; the live site may have changed since.
Kanjidon ships with the launch fundamentals in place, with a thorough launch checklist, well-configured email security, and clean crawl signals. Worth fixing first: no Content-Security-Policy and placeholder text in the legal pages.
Launched on Product Hunt on June 28, 2026. The site is hosted on Cloudflare in the United States, with a domain registered 11 months before launch. The crawl picked up 10 technologies on this site, covering hosting, CDN, DNS providers, and business email. The stack includes Brevo, Cloudflare, and Cloudflare DNS.
For context, it's on a stack we've seen on only 8 launches and tighter on security headers than most Product Hunt launches.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (10)
| CDN |
Cloudflare
|
| DNS |
Cloudflare DNS
|
| Hosting |
IONOS
|
Render
|
|
| Protocol | HTTP/3 |
| Security | HSTS |
| Business email |
IONOS Email
|
| Email marketing |
Brevo
(2)
|
| Transactional email |
Resend
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Storage (0)
Readiness Breakdown How?
Performance How?
⚠ 22 images: 16 oversized, 20 without width/height
Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI code-structure signals | +5 |
| AI scaffolding signals | +8 |
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.