Productivity
WebCalcSys
Last updated 2026-06-08 · benchmark measured 2026-08-09 — deterministic & reproducible
WebCalcSys is the best free online calculator ecosystem featuring 1000+ calculators for finance, health, math, science, construction, conversions, and everyday life. Use our free online calculator tools including BMI calculator, scientific calculator, online calculator with fract
Is WebCalcSys production-ready?
Legit.Show scores WebCalcSys 89 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on WebCalcSys (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Security; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.
The 7 Frames
- Performance — 82/100
- Accessibility — 92/100
- Security — 100/100
- Privacy — 75/100
- Reliability — 90/100
- Standards — 94/100
- Discoverability — 90/100
What we measured
- Security headers present: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
- Served over HTTPS with a valid certificate.
- Real Lighthouse performance run — 146 ms to first byte.
- Returns a proper 404 for unknown routes.
- 2 of 3 sampled routes reachable.
- Has a reachable privacy policy.
- Sets cookies / loads scripts with no consent prompt.
- Discoverable: structured data, OpenGraph image, canonical URL.
Pricing
Free
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