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StrokeLab

Upload your swim photos or videos and get instant AI-powered feedback on your swim stroke technique. Improve your swim form with personalized coaching from StrokeLab.

Health
United States Estimated origin: United States

Added July 11, 2026 · Last analysed July 11, 2026 · via · 75% 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 11 July 2026; the live site may have changed since.

StrokeLab ships with the launch fundamentals in place, with complete legal pages, a thorough launch checklist, and clean crawl signals. Worth fixing first: no Content-Security-Policy and no email security records.

Launched on Product Hunt on July 11, 2026. The site is hosted on Vercel, with a domain registered 1 week before launch. We've detected 11 technologies on this site, covering ui library, analytics, auth, and CSS frameworks. The stack includes Auth.js, Next.js, and React.

It's running the same core stack as 9,991 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 →

9.5
StackScope Score
Excellent
100/100 Launch Readiness
Launch ready
3/3 Legal
Complete
2/2 Crawl files
Complete
Vibe Score 45 · Some 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 (11)

Infrastructure
DNS Vercel DNS
Hosting Vercel
Security HSTS
Build & Framework
Auth Auth.js
CSS framework Tailwind CSS
Framework React
Meta-framework Next.js (4)
UI library Lucide Icons
shadcn/ui
Analytics & Marketing
Analytics Vercel Analytics medium
SEO Google Search Console (2)

Infrastructure

Network
AS16509 · US
DNS
Vercel 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
8 days
Registered Jul 2026 · NameSilo, LLC

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
__Host-authjs.csrf-token session Auth.js
__Secure-authjs.callback-url session Auth.js

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?

340 ms Server response
51% Faster than peers
720 ms Largest contentful paint
0.20 Cumulative layout shift
562 KB Page weight
231 KB Image weight
1 Third-party domains
2 Console errors
1 Failed requests
Broken first-party requests (1), worth fixing
  • 404 /images/hero-poster.jpg

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 CSS signals +10
AI palette signals +5
AI writing signals +5
AI stack signals +10
AI layout signals +5
Default scaffold favicon +10

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 (7 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy
Terms of Service
/terms
? Analytics present, but it set no tracking cookies on our visit (it may be opt-in-gated).
86% unique

Security Headers (5/6)

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

Build

Code splitting
19 JS files
1 CSS files
1 Third-party domains

Brand Colours

App Manifest

StrokeLab - AI Swimming Stroke Analysis
display: standalone 1 icon
theme #3b5ccc
sports health
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.