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Cold Plunge Calc

A free training system that checks your risk, calculates a safe plunge time for your water temperature and goal, then builds a week-by-week plan toward the roughly 11 minutes a week that regular cold-water swimmers tend to accumulate.

Health

Visit site · Added June 27, 2026 · Last analysed June 27, 2026 · via · 62% unique tagline

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 June 2026; the live site may have changed since.

Cold Plunge Calc scores well across the board, with complete legal pages, a thorough launch checklist, and clean crawl signals. Visible gaps: missing several security headers and incomplete email security.

Launched on Product Hunt on June 27, 2026. The site is hosted on Cloudflare in the United States, with a domain registered 3 days before launch. We've detected 11 technologies on this site, covering analytics, CDN, CSS frameworks, and DNS providers. The stack includes Next.js, React, and Tailwind CSS.

It's on one of the most common stacks we track, shared by 3,045 launches.

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

8.1
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
3/3 Legal
Complete
2/2 Web Standards
Complete
Vibe Score 15 · Few AI signals
Informational pattern-match signal. Does not feed the StackScope Score. See which fingerprints fired →

Tech Stack (11)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Protocol HTTP/3
Email
Email forwarding Cloudflare Email Routing (2)
Build & Framework
CSS framework Tailwind CSS
Framework React
Icon font Font Awesome
Meta-framework Next.js (4)
Package CDN cdnjs
Analytics & Marketing
Analytics Cloudflare Web Analytics (2)
SEO Google Search Console

Infrastructure

Network
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 24 Jun 2026 to 22 Sep 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
4 days
Registered Jun 2026 · Cloudflare, 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 (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)
Twitter card meta tags
Canonical URL declared
Responsive viewport meta tag
Favicon present
Semantic HTML (nav, main, article)
Page title is 62 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 234 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?

228 ms Server response
67% Faster than peers
572 ms Largest contentful paint
0.00 Cumulative layout shift
720 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
Placeholder branding +10
AI writing signals +5

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
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (196 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/en/privacy/
Terms of Service
/en/terms/
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
98% unique

Security Headers (2/6)

Permissions-Policy experimental (check browser support)
X-XSS-Protection deprecated (use Content-Security-Policy)

Build

Code splitting
10 JS files
3 CSS files
3 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.