CalculatorFirst

392+ free calculators covering finance, math, health, conversions, and more. Every result includes the formula and a plain-language explanation. No sign-up needed.

Added July 27, 2026 · Last analysed July 27, 2026 · via

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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 27 July 2026; the live site may have changed since.

CalculatorFirst has the basics covered well, with a thorough launch checklist and clean crawl signals. What needs work: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Product Hunt on July 27, 2026. The site is hosted on Vercel, with a domain registered 3 months before launch. Our crawler found 10 technologies on this site, covering analytics, DNS providers, email forwarding, and frameworks. The stack includes Next.js, React, and Google Analytics.

It's also running the same core stack as 2,565 other launches.

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

6.7

StackScope Score

Good

100/100 Launch Readiness

Launch ready

1/6 Security Headers

Poor

2/3 Legal

Partial

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	Namecheap DNS
Hosting	Vercel
Security	HSTS

Email forwarding	Namecheap Email Forwarding (2)

Build & Framework

Framework	React
Meta-framework	Next.js (5)

Analytics & Marketing

Analytics	Google Analytics (5)
Analytics	Vercel Analytics medium
SEO	Google Search Console
Tag management	Google Tag Manager (2)

Infrastructure

Network

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

AS16509 · US

DNS

Namecheap 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 3 Jul 2026 to 1 Oct 2026

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

Domain Age

3 months

Registered Apr 2026 · NameCheap, Inc.

Email Security

✓

SPF ~all Soft-fail (~all). Common and accepted.

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.

Storage (2)

Cookies (2)

Name	Lifetime	Detected as
_ga	1y	Google Analytics
_ga_1MQ01FHFSR	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)

⚠

Meta description is 163 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.

Performance How?

236 ms Server response

65% Faster than peers

392 ms Largest contentful paint

0.00 Cumulative layout shift

1.2 MB Page weight

2 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

Welcomes AI crawlers

✓ 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 (443 URLs)

✗ security.txt

✓ llms.txt

✗ ads.txt

✗ humans.txt

Legal

✓ Privacy Policy

/privacy-policy/

? Terms of Service not detected

? Consent manager not detected

Analytics set tracking cookies on our visit, with no opt-in step.

92% unique

Mentions:

Cookies Do Not Sell

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

✓ Code splitting

9 JS files

1 CSS files

2 Third-party domains

Brand Colours

App Manifest

CalculatorFirst

display: standalone 2 icons

theme #1A1A2E

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