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CalcFi

Free financial calculators for mortgage, FIRE, taxes, retirement, debt & more. 500+ tools, no signup — get instant results.

77% unique tagline

calcfi.app · Added April 12, 2026 · Last analysed April 12, 2026· via Hacker News

This analysis is a snapshot taken on 12 April 2026. The site may have changed since then and results may not reflect its current state.
9.4
StackScope Score
Excellent
20/100 Vibe Score
Few AI signals
100/100 Launch Readiness
Launch ready
open
AI Stance
Welcomes AI crawlers

Tech Stack (16)

Infrastructure
Cloudflare DNS DNS ns_host
HSTS Security http_header_name
Vercel Hosting http_header_name
Email
Cloudflare Email Routing Business email mx_host spf_include
Resend Transactional email dkim_selector spf_include
Build & Framework
Next.js Meta-framework http_header_name meta_name
React Framework structural_signal
Supabase Baas csp_allowed_host
Tailwind CSS CSS framework structural_signal
Analytics & Marketing
Google Analytics Analytics cookie_name csp_allowed_host script_src
Google Search Console Seo txt_prefix
Google Tag Manager Tag management csp_allowed_host link_href
Impact Affiliate meta_name
Microsoft Clarity Analytics script_src
PostHog Analytics cookie_name script_src
SaaSHub Seo meta_name

Infrastructure

SSL Certificate
Let's Encrypt
Expires 23 Jun 2026
Domain Age
18 days
Registered Mar 2026 · Namecheap Inc.

Readiness Breakdown How?

Favicon present
Open Graph tags (title, image, description)
Canonical URL declared
Responsive viewport meta tag
Custom title and meta description
Twitter card meta tags
Semantic HTML (nav, main, article)
Privacy policy page present
- Source maps not exposed in production
- Error tracking service installed

Vibe Score Breakdown How?

SignalPoints
Conventional landing-page palette +5
Distinctive copy style +5
Conventional AI tooling combination +10

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.

Well-Known Files

llms.txt
security.txt
ads.txt
humans.txt

Legal

88% unique
Mentions:
GDPR Cookies Do Not Sell

Security Headers (6/6)

Referrer-Policy
X-Frame-Options
Permissions-Policy
X-Content-Type-Options
Content-Security-Policy
Strict-Transport-Security
X-XSS-Protection (legacy)

DMARC

p=quarantine Quarantine (moderate)

Performance

149ms response time
Faster than 78% of sites
21 third-party domains loaded

Build

HTML minified
15 JS files
21 Third-party domains
Is this your site? 1 tip to improve your score
- Add a /.well-known/security.txt so security researchers can reach you. Learn more
Embed this score on your site
StackScope Score
<a href="https://stackscope.dev/launch/er59nobt/calcfi"><img src="https://stackscope.dev/badge/er59nobt.svg" alt="StackScope Score" height="28" /></a>