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Calcuto

Calcuto offers free online calculators for finance, health, math, dates, and everyday conversions. Fast and simple to use, with no sign-up required. No sign-up

Added July 18, 2026 · Last analysed July 18, 2026 · via · 17% unique tagline (similar to Quick Calcs)

Own this Launch?
Screenshot of Calcuto

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

Calcuto ships with the launch fundamentals in place, with complete legal pages, a complete set of security headers, and a thorough launch checklist. What needs work: tracking cookies set before any opt-in and no email security records.

Launched on Product Hunt on July 18, 2026. The site is served through Cloudflare, with a domain registered 1 week before launch. The crawl picked up 9 technologies on this site, covering analytics, CDN, DNS providers, and business email. The stack includes Next.js, React, and Cloudflare.

For context, it's running the same core stack as 762 other launches and tighter on security headers than most Product Hunt launches.

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

10.0
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
6/6 Security Headers
Strong
3/3* Legal
Complete*
2/2 Crawl files
Complete
100/100 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 (9)

Infrastructure
CDN Cloudflare (2)
DNS Cloudflare DNS
Security HSTS
Email
Business email Google Workspace (2)
Build & Framework
Framework React
Meta-framework Next.js (4)
Analytics & Marketing
Analytics Google Analytics (6)
SEO Google Search Console
Tag management Google Tag Manager (3)

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
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
Google Trust Services
Valid 5 Jul 2026 to 3 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
12 days
Registered Jul 2026 · NameCheap, Inc.

Email Security

✗
SPF Not published. Your domain can be spoofed in phishing emails.
✓
DKIM Detected via known email provider
✗
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 (3)

Cookies (3)
NameLifetimeDetected as
cf_clearance 1y Cloudflare
_ga 1y Google Analytics
_ga_FGFRPJZXJR 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)

Performance How?

238 ms Server response
65% Faster than peers
356 ms Largest contentful paint
0.00 Cumulative layout shift
364 KB Page weight
2 Third-party domains
12 Console errors
10 Failed requests
Broken first-party requests (10), worth fixing
  • 403 /other?_rsc=1p-R_iEY6bj0jY31
  • 403 /contact?_rsc=1p-R_iEY6bj0jY31
  • 403 /disclaimer?_rsc=1p-R_iEY6bj0jY31
  • 403 /date-time?_rsc=1p-R_iEY6bj0jY31
  • 403 /terms?_rsc=1p-R_iEY6bj0jY31
  • 403 /privacy?_rsc=1p-R_iEY6bj0jY31
  • 403 /about?_rsc=1p-R_iEY6bj0jY31
  • 403 /health?_rsc=1p-R_iEY6bj0jY31

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

AI Stance

Blocks AI crawlers
✗ llms.txt published
✗ 9 AI bots blocked in robots.txt
Content-Signal
✗ ai-train = no
✓ search = yes
? ai-input (not declared)
Link headers
? None advertised

Well-Known Files

✓ robots.txt
✓ sitemap.xml (319 URLs)
✗ security.txt
✗ llms.txt
✗ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy
✓ Terms of Service
/terms
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
92% unique
Mentions:
Cookies

Security Headers (6/6)

✓
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

Calcuto
display: standalone 1 icon
theme #23201B
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.