New: The State of Indie Launches: June 2026. Who adopts a piece of infrastructure tells you how new it is. Read

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Percent Off Calculator

Free percent off calculator. Find sale price, savings, stacked discounts and reverse calculate the original price.

Added July 3, 2026 · Last analysed July 3, 2026 · via · 50% 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 3 July 2026; the live site may have changed since.

Percent Off Calculator looks production-ready overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. What needs work: missing several security headers, tracking cookies set before any opt-in, and incomplete email security.

Launched on Product Hunt on July 3, 2026. The site is served through Cloudflare. We've detected 11 technologies on this site, covering analytics, wordpress plugin, CDN, and CMS. The stack includes WordPress, Ahrefs, and Cloudflare.

It's running the same core stack as 1,040 other launches.

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

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 (11)

Infrastructure
CDN Cloudflare
DNS Cloudflare DNS
Protocol HTTP/3
Email
Email forwarding Cloudflare Email Routing (2)
Build & Framework
CMS WordPress (5)
WordPress plugin Kadence
Yoast
Analytics & Marketing
Analytics Ahrefs
Google Analytics (4)
SEO Google Search Console
Tag management Google Tag Manager medium

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
Let's Encrypt
Valid 1 Jul 2026 to 29 Sep 2026
Certificate as captured in this snapshot, not a live check.

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 (3)

Cookies (2)
NameLifetimeDetected as
_ga 1y Google Analytics
_ga_C167VETBE6 1y Google Analytics
Session storage (1)
KeySizeDetected as
wpEmojiSettingsSupports 70 B WordPress

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?

179 ms Server response
75% Faster than peers
2780 ms Largest contentful paint
0.00 Cumulative layout shift
1.0 MB Page weight
23 KB Image weight
3 Third-party domains
0 Console errors
0 Failed requests

2 images: 1 oversized

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 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

Blocks AI crawlers but publishes an llms.txt
llms.txt published
9 AI bots blocked in robots.txt
ai-train = no
search = yes
? ai-input (not declared)
? None advertised

Well-Known Files

robots.txt
sitemap.xml (2 URLs)
security.txt
llms.txt
ads.txt
humans.txt
Privacy Policy
/privacy-policy/
Terms of Service
/terms/
? Consent manager not detected
Analytics set tracking cookies on our visit, with no opt-in step.
58% unique

Security Headers (0/6)

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

Build

Code splitting
6 JS files
9 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.