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Zone 2 Heart Rate Calculator

Calculate your zone 2 heart rate for aerobic training. Use our zone 2 cardio calculator with MAF and Karvonen methods to find your fat burning heart rate zone.

Health

Added April 22, 2026 · Last analysed April 22, 2026 · via · 78% unique tagline

Own this Launch?
Screenshot of Zone 2 Heart Rate Calculator

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 22 April 2026; the live site may have changed since.

Zone 2 Heart Rate Calculator is largely in shape, with complete legal pages and clean crawl signals. Worth fixing first: missing several security headers and incomplete email security.

Launched on Product Hunt on April 22, 2026. The site is hosted on Hostinger and served through Cloudflare, with a domain registered 4 days before launch. The crawl picked up 13 technologies on this site, covering advertising, AI builders, CDN, and consent tooling. The stack includes Google Funding Choices, Tailwind CSS, and Cloudflare.

For context, it's running the same core stack as 569 other launches.

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

6.1
StackScope Score
Good
64/100 Launch Readiness
Well prepared
0/6 Security Headers
Poor
3/3 Legal
Complete
2/2 Crawl files
Complete
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 (13)

Infrastructure
CDN Cloudflare (3)
DNS Cloudflare DNS
Hosting Hostinger
Protocol HTTP/3 (2)
Email
Business email Hostinger Email
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
UI library shadcn/ui
Analytics & Marketing
Advertising Google Ads
Google AdSense
Consent Google Funding Choices
SEO Google Search Console
AI & Emerging
AI builder Hostinger Horizons (3)

Infrastructure

Network
CLOUDFLARENET - Cloudflare, Inc., US
AS13335 · US
DNS
Cloudflare DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.
SSL Certificate
Let's Encrypt
Valid 21 Apr 2026 to 20 Jul 2026
Certificate as captured in this snapshot, not a live check.
Domain Age
3 months
Registered Apr 2026 · HOSTINGER operations, UAB

Email Security

✓
SPF ~all Soft-fail (~all). Common and accepted.
?
DKIM Not detected at common selectors. Your provider may use a custom one.
✗
DMARC p=none None (p=none). Monitoring only.
?
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 (1)

Cookies (1)
NameLifetimeDetected as
FCCDCF 1y Google Funding Choices

Readiness Breakdown How?

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

AI Stance

Blocks AI crawlers but publishes an llms.txt
✓ 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 (5 URLs)
✗ security.txt
✓ llms.txt
✓ ads.txt
✗ humans.txt

Legal

✓ Privacy Policy
/privacy
✓ Terms of Service
/terms
✓ Consent manager: Google Funding Choices
4% unique

Security Headers (0/6)

✗
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)

Performance

610ms response time
Faster than 27% of sites
2 third-party domains loaded

Build

✓ Code splitting
5 JS files
1 CSS files
2 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.