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Free Calculators Online

Más de 80 calculadoras gratuitas organizadas por categorías. Salud, finanzas, unidades, fitness, cocina y más. Sin registro, sin anuncios.

Added July 17, 2026 · Last analysed July 17, 2026 · via · 60% unique tagline

Own this Launch?
Screenshot of Free Calculators Online

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

Free Calculators Online has the basics covered well, with a thorough launch checklist and clean crawl signals. Worth fixing first: missing several security headers, incomplete legal pages, and tracking cookies set before any opt-in.

Launched on Product Hunt on July 17, 2026. The site is hosted on Netlify, with a domain registered 1 week before launch. Our crawler found 7 technologies on this site, covering analytics, DNS providers, web fonts, and hosting. The stack includes Google Analytics, Google Fonts, and Google Search Console.

It's also running the same core stack as 1,561 other launches.

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

6.2
StackScope Score
Good
84/100 Launch Readiness
Well prepared
1/6 Security Headers
Poor
2/3 Legal
Partial
2/2 Crawl files
Complete
93/100 Performance
Fast
Vibe Score 23 · Few 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 (7)

Infrastructure
DNS NS1
Hosting Netlify
Security HSTS
Build & Framework
Font Google Fonts
Analytics & Marketing
Analytics Google Analytics (4)
SEO Google Search Console
Tag management Google Tag Manager medium

Infrastructure

Network
AMAZON-02 - Amazon.com, Inc., US
AS16509 · US
DNS
NS1
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 6 Jul 2026 to 4 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
11 days
Registered Jul 2026 · Name.com, Inc.

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 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)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_9RPZFQTQCL 1y Google Analytics

Readiness Breakdown How?

✓ Custom title and meta description
⚠
Open Graph tags (title, image, description) (partial) missing og:image
✓ Canonical URL declared
✓ Responsive viewport meta tag
✓ Favicon present
✓ Semantic HTML (nav, main, article)
- Twitter card meta tags

Performance How?

863 ms Server response
15% Faster than peers
740 ms Largest contentful paint
0.02 Cumulative layout shift
523 KB Page weight
3 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.

Vibe Score Breakdown How?

SignalPoints
AI palette signals +5
AI iconography signals +3
AI CSS signals +15

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

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

Legal

? Privacy Policy not detected
✓ Terms of Service
/calculadoras/salud/calorias-alimentos/
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.

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

2 JS files
2 CSS files
3 Third-party domains

Brand Colours

App Manifest

display: standalone 2 icons
theme #ffffff
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.