Calcora
Calcora provides 256 verified free online calculators for finance, mortgage, health, algebra, physics, unit conversions, and construction with instant client-side math.
Added August 15, 2026
· Last analysed August 15, 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 15 August 2026; the live site may have changed since.
Calcora scores highly overall, with complete legal pages, a thorough launch checklist, and fast page loads. Main gaps: missing several security headers and no email security records.
Launched on Product Hunt on August 15, 2026. The site is served through Cloudflare. The crawl picked up 7 technologies on this site, covering CDN, CSS frameworks, developer tools, and DNS providers. The stack includes Tailwind CSS, Cloudflare, and Cloudflare DNS.
For context, it's on one of the most common stacks we track, shared by 6,999 launches.
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Tech Stack (7)
| CDN |
Cloudflare
|
| DNS |
Cloudflare DNS
|
| CSS framework |
Tailwind CSS
|
| Developer tools |
Vite
|
| Font |
Google Fonts
|
| UI library |
Lucide Icons
|
| SEO |
Google Search Console
|
Infrastructure
Email Security
Storage (6)
| Key | Size | Detected as |
|---|---|---|
| calcora_analytics_data | 1.1 KB | - |
| calcora_favorites | 38 B | - |
| calcora_history | 2 B | - |
| calcora_lang | 2 B | - |
| calcora_recently_viewed | 32 B | - |
| calcora_total_calc_count | 4 B | - |
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 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.