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PercentMaster

Free calculators for percentages, interest, tips, tax, BMI, loans, and conversions. Fast, accurate, mobile-friendly tools with clear formulas—no sign-up.

Productivity

Added April 5, 2026 · Last analysed April 10, 2026 · via · 40% unique tagline (similar to FinCalc)

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

PercentMaster is largely in shape, with complete legal pages, a thorough launch checklist, and clean crawl signals. What needs work: missing several security headers and incomplete email security.

Launched on Product Hunt on April 5, 2026. The site is hosted on Hostinger. The crawl picked up 10 technologies on this site, covering seo, CSS frameworks, developer tools, and DNS providers. The stack includes Tailwind CSS, Google Search Console, and Google Tag Manager.

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 →

7.6
StackScope Score
Good
100/100 Launch Readiness
Launch ready
3/3 Legal
Complete
2/2 Crawl files
Complete
Vibe Score 5 · Few 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 (10)

Infrastructure
DNS Hostinger DNS
Hosting Hostinger (3)
Protocol HTTP/3 (2)
Email
Business email Hostinger Email
Build & Framework
CSS framework Tailwind CSS
Developer tools Vite
UI library shadcn/ui
Analytics & Marketing
SEO Google Search Console
Prerender.io
Tag management Google Tag Manager

Infrastructure

Network
AS47583 · UA
DNS
Hostinger DNS
Authoritative nameserver
DNSSEC
Not enabled
DNS responses unsigned. Cache-poisoning vulnerable.

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.

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)

Vibe Score Breakdown How?

SignalPoints
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

Welcomes AI crawlers
llms.txt published
No AI bots blocked in robots.txt
? No directive declared
? None advertised

Well-Known Files

robots.txt
sitemap.xml (68 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy
Terms of Service
/terms

Security Headers (1/6)

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

Performance

1130ms response time
Faster than 9% of sites
2 third-party domains loaded

Build

1 JS files
1 CSS files
2 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.