CalcoWorks
Free online calculators, PDF tools, and developer utilities. EMI, GST, SIP, loan, BMI and more — fast, accurate, free.
Estimated origin: India
Added July 23, 2026
· Last analysed July 23, 2026 · via 
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 23 July 2026; the live site may have changed since.
CalcoWorks scores highly overall, with complete legal pages, a complete set of security headers, and a thorough launch checklist. Main gaps: tracking cookies set before any opt-in and incomplete email security.
Launched on Product Hunt on July 23, 2026. The site is served through Cloudflare, with a domain registered 2 weeks before launch. We've detected 20 technologies on this site, covering advertising, analytics, ui library, and auth. The stack includes Auth.js, Next.js, and React.
It's on one of the most common stacks we track, shared by 4,141 launches and more locked down than the typical Product Hunt launch.
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Tech Stack (20)
| CDN |
Cloudflare
|
| DNS |
Cloudflare DNS
|
| Protocol | HTTP/3 |
| Security | HSTS |
| Server |
LiteSpeed Web Server
|
| Email forwarding |
Namecheap Email Forwarding
(2)
|
| Email marketing |
Brevo
|
| Auth |
Auth.js
|
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| JavaScript library |
Zod
|
| Meta-framework |
Next.js
(5)
|
| UI library |
Lucide Icons
|
shadcn/ui
|
| Advertising |
Google Ads
(2)
|
Google AdSense
(2)
|
|
| Analytics |
Cloudflare Web Analytics
|
Google Analytics
(5)
|
|
| SEO |
Google Search Console
|
| Tag management |
Google Tag Manager
(5)
|
Infrastructure
Email Security
Storage (4)
| Name | Lifetime | Detected as |
|---|---|---|
| _ga | 1y | Google Analytics |
| _ga_XHR8T9VMZY | 1y | Google Analytics |
| __Host-authjs.csrf-token | session | Auth.js |
| __Secure-authjs.callback-url | session | Auth.js |
Readiness Breakdown How?
Performance How?
⚠ 2 images: 1 oversized, 1 without width/height
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 |
|---|---|
| Placeholder branding | +10 |
| AI CSS signals | +10 |
| AI palette signals | +5 |
| AI writing signals | +5 |
| AI stack signals | +10 |
| Round-number metric claim | +5 |
| Default scaffold favicon | +10 |
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.