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Kana Challenge

The structured foundation for your first 30 days of Japanese. Hiragana, katakana, 250+ words, native audio, speaking practice. Free on Android.

Education

Added June 30, 2026 · Last analysed June 30, 2026 · via PeerPush · 75% unique tagline

Own this Launch?
Screenshot of Kana Challenge

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 30 June 2026; the live site may have changed since.

Kana Challenge has the basics covered well, with a thorough launch checklist and clean crawl signals. Main gaps: missing Content-Security-Policy and Strict-Transport-Security, incomplete legal pages, and incomplete email security.

Launched on PeerPush on June 30, 2026. The site is served through Cloudflare, with a domain registered in 2023. Our crawler found 9 technologies on this site, covering analytics, CDN, DNS providers, and business email. The stack includes Svelte, Cloudflare, and Cloudflare DNS.

It's also one of 29 launches on this exact stack and more locked down than the typical PeerPush launch.

If you own this site, refresh the snapshot and see the full fix list any time →

6.9
StackScope Score
Good
100/100 Launch Readiness
Launch ready
4/6 Security Headers
Decent
0/3 Legal
Missing
2/2 Crawl files
Complete
64/100 Performance
Fair
Vibe Score 25 · Some AI signals
How much the site looks AI-generated. Informational pattern-match signal, not a verdict. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (9)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Protocol HTTP/3
Email
Business email GoDaddy Email
Email marketing Sender
Build & Framework
Font Google Fonts
Framework Svelte
Analytics & Marketing
Analytics Cloudflare Web Analytics (2)
SEO Google Search Console

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 12 May 2026 to 10 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
3.2 years
Registered Apr 2023 · GoDaddy.com, LLC

Email Security

✓
SPF -all Strict (-all). Strong.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC p=none None (p=none). Monitoring only.
?
MTA-STS Not deployed. Mail to your domain can be downgraded to plaintext en route.
?
TLS-RPT Not configured. You won't hear about silent SMTP TLS handshake failures.

Storage (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Twitter card meta tags
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Page title is 75 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
⚠
Meta description is 181 characters (advisory) Google only shows about 155–160 characters of the description in desktop search results (less on mobile); anything past that won't appear.

Performance How?

569 ms Server response
30% Faster than peers
912 ms Largest contentful paint
0.15 Cumulative layout shift
14.2 MB Page weight
554 KB Image weight
4 Third-party domains
0 Console errors
0 Failed requests

⚠ 4 images: 4 oversized, 4 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?

SignalPoints
Placeholder branding +10
AI typography signals +15

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.

AI Stance

Blocks AI crawlers but publishes an llms.txt
✓ llms.txt published
✗ 9 AI bots blocked in robots.txt
Content-Signal
✗ ai-train = no
✓ search = yes
? ai-input (not declared)
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (48 URLs)
✗ security.txt
✓ llms.txt
✓ ads.txt
✗ humans.txt

Legal

? Privacy Policy not detected
? Terms of Service not detected
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
Detection works best on English language sites.

Security Headers (4/6)

✓
Referrer-Policy
✓
X-Frame-Options
✓
Permissions-Policy experimental (check browser support)
✓
X-Content-Type-Options
✗
Content-Security-Policy
✗
Strict-Transport-Security
–
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

1 JS files
1 CSS files
4 Third-party domains

Brand Colours

Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.