Real Online Calculator
Free online calculators for finance, health, math, science, and everyday use. 104+ tools including mortgage, BMI, percentage, loan, and compound interest.
Added July 11, 2026
· Last analysed July 11, 2026 · via 
· 33% unique tagline (similar to CalcVerse)
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 July 2026; the live site may have changed since.
Real Online Calculator scores highly overall, with complete legal pages, a thorough launch checklist, and clean crawl signals. Main gaps: missing Permissions-Policy and Content-Security-Policy, tracking cookies set before any opt-in, and incomplete email security.
Launched on Product Hunt on July 11, 2026. The site is served through Cloudflare, with a domain registered 6 days before launch. Our crawler found 10 technologies on this site, covering analytics, CDN, DNS providers, and email forwarding. The stack includes Astro, Brevo, and Cloudflare.
It's also on one of the most common stacks we track, shared by 236 launches and more locked down than the typical Product Hunt launch.
If you own this site, refresh the snapshot and see the full fix list any time →
Tech Stack (10)
| CDN |
Cloudflare
|
| DNS |
Cloudflare DNS
|
| Protocol | HTTP/3 |
| Security | HSTS |
| Email forwarding |
Cloudflare Email Routing
(2)
|
| Email marketing |
Brevo
|
| Meta-framework |
Astro
(2)
|
| Analytics |
Google Analytics
(4)
|
| SEO |
Google Search Console
|
| Tag management |
Google Tag Manager
medium
|
Infrastructure
Email Security
Storage (2)
| Name | Lifetime | Detected as |
|---|---|---|
| _ga | 1y | Google Analytics |
| _ga_C4R0BPF3WT | 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 |
|---|---|
| Placeholder branding | +10 |
| AI writing signals | +5 |
| AI code-structure signals | +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.