CalAction

iOS won't import your .ics files properly. CalAction will. Share sheet, file import, URL, QR code, and more.

Productivity

Estimated origin: Netherlands

Added April 7, 2026 · Last analysed April 10, 2026 · via Hacker News · 67% unique tagline

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

CalAction covers some of the launch checklist, with well-configured email security and fast page loads. Main gaps: missing several security headers, incomplete legal pages, and no robots.txt or sitemap.

Launched on Hacker News on April 7, 2026. The site is served through Cloudflare, with a domain registered in 2008. Our crawler found 3 technologies on this site, covering CDN, protocol, and security. The stack includes Cloudflare, HSTS, and HTTP/3.

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4.7

StackScope Score

Fair

72/100 Launch Readiness

Well prepared

3/6 Security Headers

Decent

2/3 Legal

Partial

0/2 Crawl files

Missing

Vibe Score 5 · Few 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 (3)

Infrastructure

CDN	Cloudflare (3)
Protocol	HTTP/3 (2)
Security	HSTS (2)

Infrastructure

Network

CLOUDFLARENET - Cloudflare, Inc., US

AS13335 · US

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

SSL Certificate

Google Trust Services

Valid 10 Mar 2026 to 8 Jun 2026

Certificate as captured in this snapshot, not a live check.

Domain Age

17.8 years

Registered Oct 2008 · team.blue nl B.V.

Email Security

✓

SPF ~all (via apex mijndertstuij.nl) Soft-fail (~all). Common and accepted.

✓

DKIM (via apex mijndertstuij.nl) Detected on apex mijndertstuij.nl

✓

DMARC p=reject (via apex mijndertstuij.nl) Reject (strict). Strong.

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

⚠

Open Graph tags (title, image, description) (partial) missing og:image

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Semantic HTML (nav, main, article)

⚠

Meta description is 169 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.

- Twitter card meta tags

- Favicon present

Vibe Score Breakdown How?

Signal	Points
AI writing signals	+5

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

? Terms of Service not detected

88% unique

Mentions:

Security Headers (3/6)

✓

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

142ms response time

Faster than 84% of sites

1 third-party domains loaded

Build

0 JS files

0 CSS files

1 Third-party domains

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