CalcFuel: Free Calculators
Free online calculators for finance, marketing, email, social media, and more. Instant answers, no sign-up required.
Estimated origin: Australia
Added May 8, 2026
· Last analysed May 8, 2026 · via 
· 67% 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 8 May 2026; the live site may have changed since.
CalcFuel: Free Calculators looks production-ready overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. What needs work: missing several security headers and no email security records.
Launched on Product Hunt on May 8, 2026. The site is hosted on Vercel, with a domain registered 1 week before launch. We've detected 12 technologies on this site, covering advertising, analytics, consent tooling, and CSS frameworks. The stack includes Google Funding Choices, Next.js, and React.
It's running the same core stack as 10,676 other launches.
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Tech Stack (12)
| DNS |
Nameserver.net.au DNS
|
| Hosting |
Vercel
(2)
|
| Security | HSTS (2) |
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| Meta-framework |
Next.js
(2)
|
| Advertising |
Google Ads
|
Google AdSense
|
|
| Analytics |
Google Analytics
(4)
|
| Consent |
Google Funding Choices
|
| SEO |
Google Search Console
|
| Tag management |
Google Tag Manager
|
Infrastructure
Email Security
Storage (3)
| Name | Lifetime | Detected as |
|---|---|---|
| FCCDCF | 1y | Google Funding Choices |
| _ga | 1y | Google Analytics |
| _ga_2Q8MGZ47BC | 1y | Google Analytics |
Readiness Breakdown How?
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI iconography 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.