CalcSuit

Map your biology to your schedule. Science-backed circadian rhythm calculator for peak productivity.

Health

Added April 5, 2026 · Last analysed April 10, 2026 · via · 67% unique tagline

Own this Launch?

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.

CalcSuit is largely in shape, with complete legal pages and clean crawl signals. Main gaps: missing several security headers and no email security records.

Launched on Product Hunt on April 5, 2026. The site is hosted on Vercel. The crawl picked up 9 technologies on this site, covering CSS frameworks, DNS providers, web fonts, and hosting. The stack includes Tailwind CSS, cdnjs, and Font Awesome.

For context, it's on one of the most common stacks we track, shared by 2,463 launches.

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

6.8

StackScope Score

Good

72/100 Launch Readiness

Well prepared

1/6 Security Headers

Poor

3/3 Legal

Complete

2/2 Crawl files

Complete

Vibe Score 35 · 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

DNS	Vercel DNS
Hosting	Vercel (2)
Security	HSTS (2)

Build & Framework

CSS framework	Tailwind CSS (2)
Font	Google Fonts
Icon font	Font Awesome
Localization	Google Translate
Package CDN	cdnjs

Analytics & Marketing

SEO	Google Search Console

Infrastructure

Network

AMAZON-02 - Amazon.com, Inc., US

AS16509 · US

DNS

Vercel DNS

Authoritative nameserver

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

Email Security

✗

SPF Not published. Your domain can be spoofed in phishing emails.

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

⚠

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 167 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 palette signals	+5
AI writing signals	+5
AI code-structure 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 (89 URLs)

✗ security.txt

✗ llms.txt

✓ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy.html

✓ Terms of Service

/terms.html

72% unique

Mentions:

GDPR CCPA Cookies Updated: March 18, 2026

Security Headers (1/6)

✗

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

292ms response time

Faster than 57% of sites

9 third-party domains loaded

Build

✓ Code splitting

4 JS files

4 CSS files

9 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.