Calculator4U v2.0
Free online calculators for mortgage, loans, BMI, calories, retirement, investment, and more. 85+ accurate tools for financial planning, health tracking, and everyday math. No signup required.
calculator4u.app
· Added June 17, 2026
· Last analysed June 17, 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 17 June 2026; the live site may have changed since.
Calculator4U v2.0 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 June 17, 2026. The site is hosted on Google LLC in the United States, with a domain registered 6 months before launch. The crawl picked up 14 technologies on this site, covering advertising, AI builders, analytics, and build tooling. The stack includes Express, Google Funding Choices, and Tailwind CSS.
For context, it's running the same core stack as 123 other launches.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (14)
| Build tool |
Vite
|
| CSS framework |
Tailwind CSS
|
| Font |
Google Fonts
|
| Framework |
Express
|
| UI library |
shadcn/ui
|
| Advertising |
Google Ads
|
Google AdSense
(2)
|
|
| Analytics |
Google Analytics
(3)
|
| Consent |
Google Funding Choices
(2)
|
| Tag management |
Google Tag Manager
|
| AI builder |
Replit
(2)
|
Infrastructure
Email Security
Storage (4)
| Name | Lifetime | Detected as |
|---|---|---|
| FCCDCF | 1y | Google Funding Choices |
| GAESA | 29d | - |
| _ga | 1y | Google Analytics |
| _ga_KEHJM1EC5G | 1y | Google Analytics |
Readiness Breakdown How?
Performance How?
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 CSS signals | +10 |
| AI palette signals | +5 |
| Recognised AI builder signature | +100 |
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.