Calcstack
Generate diagrams, AI agent workflows, CVs, and circuit simulations with AI. Free online tools.
Added April 22, 2026
· Last analysed April 22, 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 22 April 2026; the live site may have changed since.
Calcstack has the basics covered well, with complete legal pages and a thorough launch checklist. Main gaps: missing Permissions-Policy and Content-Security-Policy, no robots.txt or sitemap, and incomplete email security.
Launched on Product Hunt on April 22, 2026. The site is hosted on Vercel and served through Cloudflare. Our crawler found 14 technologies on this site, covering advertising, security, analytics, and auth. The stack includes Clerk, Google Funding Choices, and Next.js.
It's also on one of the most common stacks we track, shared by 10,662 launches and more locked down than the typical Product Hunt launch.
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Tech Stack (14)
| CDN |
Cloudflare
|
| DNS |
GoDaddy DNS
|
| Hosting |
Vercel
(2)
|
| Security |
Cloudflare Bot Management
|
| HSTS (2) |
| Auth |
Clerk
(7)
|
| CSS framework |
Tailwind CSS
|
| Framework |
React
|
| Meta-framework |
Next.js
(3)
|
| Advertising |
Google Ads
|
Google AdSense
|
|
| Analytics |
Google Analytics
(3)
|
| Consent |
Google Funding Choices
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Storage (10)
| Name | Lifetime | Detected as |
|---|---|---|
| FCCDCF | 1y | Google Funding Choices |
| _cfuvid | session | Cloudflare |
| _ga | 1y | Google Analytics |
| _ga_68KPM9W3W3 | 1y | Google Analytics |
| __cf_bm | < 1h | Cloudflare |
| __clerk_db_jwt | 1y | Clerk |
| __clerk_db_jwt_N8RlOwbQ | 1y | Clerk |
| __client_uat | 1y | Clerk |
| __client_uat_N8RlOwbQ | 1y | Clerk |
| Key | Size | Detected as |
|---|---|---|
| __clerk_environment | 6.3 KB | Clerk |
Readiness Breakdown How?
Vibe Score Breakdown How?
| Signal | Points |
|---|---|
| AI CSS signals | +10 |
| AI copy signals | +5 |
| AI palette signals | +5 |
| AI writing signals | +5 |
| AI iconography signals | +5 |
| AI stack signals | +10 |
| AI layout signals | +5 |
| Unfilled template placeholders | +10 |
| 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.