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United Calculator

Use United Calculator for quick and accurate calculations in math, geometry, finance, health, and more — all free and online.

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

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Screenshot of United Calculator

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 June 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.

United Calculator looks production-ready overall, with complete legal pages, a thorough launch checklist, and fast page loads. Worth fixing first: missing several security headers and incomplete email security.

Launched on Product Hunt on June 5, 2026. The site is hosted on Vercel, with a domain registered 10 months before launch. We've detected 10 technologies on this site, covering CSS frameworks, developer tools, DNS providers, and email marketing. The stack includes Tailwind CSS, Brevo, and cdnjs.

It's running the same core stack as 3,366 other launches.

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

7.5
StackScope Score
Good
94/100 Launch Readiness
Launch ready
1/6 Security Headers
Poor
3/3 Legal
Complete
2/2 Crawl files
Complete
90/100 Performance
Fast
Vibe Score 0 · No 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 (10)

Infrastructure
DNS GoDaddy DNS
Hosting Vercel
Security HSTS
Email
Email marketing Brevo
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
Font Google Fonts
Icon font Font Awesome
Package CDN cdnjs
Business Tools
SaaS Zoho

Infrastructure

Network
AMAZON-02 - Amazon.com, Inc., US
AS16509 · US
DNS
GoDaddy DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
Green hosting
Not green hosted
No green-energy record. Data from The Green Web Foundation.
SSL Certificate
Let's Encrypt
Valid 16 Apr 2026 to 15 Jul 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
1 year
Registered Aug 2025 · GoDaddy.com, LLC

Email Security

✗
SPF Not published. Your domain can be spoofed in phishing emails.
✓
DKIM Detected via known email provider
✓
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 (0)

This site uses no client-side storage we could detect on page load.

Readiness Breakdown How?

✓ Custom title and meta description
✓ Open Graph tags (title, image, description)
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
⚠
Page title is 86 characters (advisory) Google only shows about 60 characters of the title in search results; aim for 50–60 to keep the whole thing visible.
⚠
Meta description is 184 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

Performance How?

63 ms Server response
94% Faster than peers
492 ms Largest contentful paint
0.02 Cumulative layout shift
1.5 MB Page weight
4 Third-party domains
0 Console errors
0 Failed requests

Indicative grade from a single automated render, not a substitute for Lighthouse or field data, and not part of the StackScope score.

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 (208 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy
✓ Terms of Service
/terms
98% unique

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)

Build

1 JS files
4 CSS files
4 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.