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CalcSmart24

Free online calculators for math, finance, fitness, and more. 235+ accurate tools and 332+ unit converters.

Added May 5, 2026 · Last analysed May 5, 2026 · via

StackScope records what new websites are built with, the week they launch. Most we find ourselves, by watching public internet infrastructure for brand-new sites; the rest come from Product Hunt, Hacker News and PeerPush. We crawled this one for its tech stack and scored it for launch readiness: DNS, security headers, SEO basics. This page is what we saw on 5 May 2026; the live site may have changed since.

Every technology below links to its own page: which other new sites launched with it. Vendors and agencies watch those pages with Stackdar and hear about new adopters the week they ship, from £15 a month.

CalcSmart24 scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Main gaps: no Content-Security-Policy, tracking cookies set before any opt-in, and incomplete email security.

Launched on Product Hunt on May 5, 2026. The site is hosted on Railway and served through Cloudflare, with a domain registered 5 months before launch. We've detected 14 technologies on this site, covering AI builders, analytics, backend framework, and CDN. The stack includes Tailwind CSS, Cloudflare, and Cloudflare DNS.

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

9.5
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
3/3* Legal
Complete*
2/2 Crawl files
Complete
Vibe Score 100 · Strong 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 (14)

Infrastructure
CDN Cloudflare (3)
DNS Cloudflare DNS
Hosting Railway (2)
Protocol HTTP/3 (2)
Security HSTS (2)
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
Font Google Fonts
UI library shadcn/ui
Analytics & Marketing
Analytics Google Analytics (3)
SEO Google Search Console
Tag management Google Tag Manager
AI & Emerging
AI builder Replit
Other
Backend framework Express (2)

Infrastructure

Network
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Green hosted
Host runs on renewable energy. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 3 May 2026 to 1 Aug 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
9 months
Registered Nov 2025 · GoDaddy.com, LLC

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 p=quarantine Quarantine (moderate)
?
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.

Storage (2)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_9XYN8467QD 1y Google Analytics

Readiness Breakdown How?

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

Vibe Score Breakdown How?

SignalPoints
AI CSS signals +10
AI writing signals +3
Recognised AI builder signature +100

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
ai-train = no
search = yes
? ai-input (not declared)
? None advertised

Well-Known Files

robots.txt
sitemap.xml (562 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy-policy
Terms of Service
/terms
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
82% unique

Security Headers (5/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Performance

423ms response time
Faster than 38% of sites
5 third-party domains loaded

Build

2 JS files
3 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.