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JianYin Note: Free Cloud Sync

A notebook app I built for myself.

Productivity
China Estimated origin: China

Added April 20, 2026 · Last analysed April 20, 2026 · via

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Screenshot of JianYin Note: Free Cloud Sync

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 20 April 2026; the live site may have changed since.

JianYin Note: Free Cloud Sync still has work before launch. What needs work: missing several security headers, no robots.txt or sitemap, and incomplete email security.

Launched on Product Hunt on April 19, 2026. The site is hosted on GitHub Pages and served through Fastly. The crawl picked up 2 technologies on this site, covering CDN and hosting. The stack includes Fastly and GitHub Pages.

For context, it's running the same core stack as 1,757 other launches.

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

3.3
StackScope Score
Poor
41/100 Launch Readiness
Partially ready
0/6 Security Headers
Poor
3/3 Legal
Complete
0/2 Crawl files
Missing
Vibe Score 43 · 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 (2)

Infrastructure
CDN Fastly (2)
Hosting GitHub Pages (2)

Infrastructure

Network
FASTLY - Fastly, Inc., US
AS54113 · US
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
SSL Certificate
Let's Encrypt
Valid 18 Apr 2026 to 17 Jul 2026
Certificate as captured in this snapshot, not a live check.

Email Security

✓
SPF ~all (via apex bolock.dpdns.org) Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC Not published. Receivers fall back to permissive defaults.
?
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.

Readiness Breakdown How?

⚠
Custom title and meta description (partial) missing meta description
✓ Responsive viewport meta tag
✓ Semantic HTML (nav, main, article)
- Open Graph tags (title, image, description)
- Canonical URL declared
- Twitter card meta tags
- Favicon present

Vibe Score Breakdown How?

SignalPoints
Placeholder branding +10
AI iconography signals +3
AI code-structure signals +5
AI scaffolding 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

No AI stance declared
✗ llms.txt published
✓ No AI bots blocked in robots.txt
Content-Signal
? No directive declared
Link headers
? None advertised

Well-Known Files

✗ robots.txt
✗ sitemap.xml
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy-en.html
✓ Terms of Service
/terms-en.html
90% unique
Mentions:
Updated: April 11, 2026

Security Headers (0/6)

✗
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)

Performance

143ms response time
Faster than 84% of sites

Build

0 JS files
0 CSS files
0 Third-party domains

Brand Colours

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