TradeCalc

92 free calculators for construction, electrical, HVAC, plumbing, framing, concrete, landscaping, home improvement, and unit conversion. No signup required. NEC 2023 compliant.

Estimated origin: United States

Added April 10, 2026 · Last analysed April 10, 2026 · via · 71% 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.

TradeCalc ships with the basics, with complete legal pages, fast page loads, and clean crawl signals. Worth fixing first: missing several security headers and no email security records.

Launched on Product Hunt on April 10, 2026. The site is served through Cloudflare. We've detected 9 technologies on this site, covering advertising, analytics, CDN, and consent tooling. The stack includes Google Funding Choices, Cloudflare, and Cloudflare DNS.

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

5.8

StackScope Score

Fair

52/100 Launch Readiness

Partially ready

0/6 Security Headers

Poor

3/3 Legal

Complete

2/2 Crawl files

Complete

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 (9)

Infrastructure

CDN	Cloudflare (3)
DNS	Cloudflare DNS
Protocol	HTTP/3 (2)

Analytics & Marketing

Advertising	Google Ads
Advertising	Google AdSense
Analytics	Cloudflare Web Analytics
Analytics	Google Analytics (2)
Consent	Google Funding Choices (2)
SEO	Google Search Console (2)

Infrastructure

Network

CLOUDFLARENET - Cloudflare, Inc., US

AS13335 · US

DNS

Cloudflare DNS

Authoritative nameserver

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

SSL Certificate

Google Trust Services

Valid 28 Mar 2026 to 26 Jun 2026

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

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 (partial) missing custom <title>

✓ Canonical URL declared

✓ Responsive viewport meta tag

✓ Semantic HTML (nav, main, article)

⚠

Meta description is 176 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.

- Open Graph tags (title, image, description)

- Twitter card meta tags

- Favicon present

Vibe Score Breakdown How?

Signal	Points
AI iconography 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

Blocks AI crawlers

✗ 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 (103 URLs)

✗ security.txt

✗ llms.txt

✓ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy.html

✓ Terms of Service

/terms.html

✓ Consent manager: Google Funding Choices

86% unique

Mentions:

GDPR Cookies

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

95ms response time

Faster than 95% of sites

5 third-party domains loaded

Build

✓ Code splitting

6 JS files

0 CSS files

5 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.