United Calculator

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

www.unitedcalculator.net · Added June 5, 2026 · Last analysed June 5, 2026 · via · 50% 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 5 June 2026; the live site may have changed since.

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 Amazon.com in the United States, with a domain registered 10 months before launch. We've detected 10 technologies on this site, covering build tooling, CSS frameworks, DNS providers, and business email. The stack includes Tailwind CSS, Vite, and Brevo.

It's running the same core stack as 1,364 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 Web Standards

Complete

90/100 Performance

Fast

Vibe Score 0 · No AI signals

Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (10)

Infrastructure

DNS	GoDaddy DNS
Hosting	Vercel
Security	HSTS

Business email	Zoho Mail
Email marketing	Brevo

Build & Framework

Build tool	Vite
CSS framework	Tailwind CSS
Font	Google Fonts
Icon font	Font Awesome
Package CDN	cdnjs

Infrastructure

Network

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

AS16509 · US

DNS

GoDaddy DNS

Authoritative nameserver

DNSSEC

Not enabled

DNS responses unsigned. Cache-poisoning vulnerable.

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

10 months

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

98% 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

✓ Terms of Service

98% unique

Mentions:

Cookies Updated: May 14, 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)

Build

✓ HTML minified

✗ CSS minified

✗ JS minified

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.