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SyncHours

Compare global time zones instantly with interactive 24-hour visual overlap grids.

Added July 28, 2026 · Last analysed July 28, 2026 · via

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Screenshot of SyncHours

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

SyncHours ships with the basics, with complete legal pages. What needs work: missing several security headers, no robots.txt, and tracking cookies set before any opt-in.

Launched on Product Hunt on July 28, 2026. The site is hosted on Vercel, with a domain registered the day of launch. We've detected 9 technologies on this site, covering analytics, CSS frameworks, developer tools, and DNS providers. The stack includes Tailwind CSS, Google Analytics, and Google Search Console.

It's running the same core stack as 2,690 other launches.

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

5.8
StackScope Score
Fair
72/100 Launch Readiness
Well prepared
1/6 Security Headers
Poor
3/3* Legal
Complete*
1/2 Crawl files
Partial
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
DNS Vercel DNS
Hosting Vercel
Security HSTS
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
JavaScript library React Router
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
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 27 Jul 2026 to 25 Oct 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
2 days
Registered Jul 2026 · Squarespace Domains II 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 (4)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_PJ2RLQY87K 1y Google Analytics
Local storage (2)
KeySizeDetected as
synchours_cities 152 B -
synchours_presets 2 B -

Readiness Breakdown How?

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

Performance How?

251 ms Server response
56% Faster than peers
536 ms Largest contentful paint
0.00 Cumulative layout shift
282 KB Page weight
1 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

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 (91 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.
78% unique
Mentions:
Cookies DPO Updated: July 27, 2026

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
1 CSS files
1 Third-party domains
Something not look right? If a technology shown here is wrong or out of date, email [email protected] and we'll review it.