CalculatorFlux
163 free, accurate online calculators for payroll, finance, health, GPA, construction, and more. All 50 US states covered. No sign-up. Updated for 2025-26.
calculatorflux.com
· Added June 11, 2026
· Last analysed June 11, 2026 · via 
· 40% unique tagline (similar to QuickCalc Tools)
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 11 June 2026; the live site may have changed since.
CalculatorFlux scores well across the board, with complete legal pages, a complete set of security headers, and a thorough launch checklist. Main gaps: analytics without a consent banner and incomplete email security.
Launched on Product Hunt on June 11, 2026. The site is hosted on Cloudflare in the United States, with a domain registered 7 weeks before launch. The crawl picked up 11 technologies on this site, covering analytics, CDN, DNS providers, and business email. The stack includes Next.js, React, and Cloudflare.
For context, it's on one of the most common stacks we track, shared by 418 launches and more locked down than the typical Product Hunt launch.
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Tech Stack (11)
| CDN |
Cloudflare
|
| DNS |
Cloudflare DNS
|
| Protocol | HTTP/3 |
| Security | HSTS |
| Business email |
Cloudflare Email Routing
(2)
|
| Font |
Google Fonts
|
| Framework |
React
|
| Meta-framework |
Next.js
|
| Analytics |
Google Analytics
(5)
|
| SEO |
Google Search Console
|
| Tag management |
Google Tag Manager
(2)
|
Infrastructure
Email Security
Storage (2)
| Name | Lifetime | Detected as |
|---|---|---|
| _ga | 1y | Google Analytics |
| _ga_4E8E9FKEK6 | 1y | Google Analytics |
Readiness Breakdown How?
Performance How?
⚠ 11 images: 5 oversized, 5 without width/height, 7 missing alt text
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?
| Signal | Points |
|---|---|
| AI palette 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.