Legit.Show measured sigmajp's Security frame at 35/100. Security headers present: X-Content-Type-Options. No Content-Security-Policy and no HSTS. Served over HTTPS with a valid certificate.

How does Legit.Show measure sigmajp?

Legit.Show scores seven frames — Performance, Accessibility, Security, Privacy, Reliability, Standards and Discoverability — deterministically from the public surface (URL, HTTP headers, real Lighthouse), with no LLM in the scoring path. See legit.show/methodology.

Education & Reference

sigmajp

Last updated 2026-11-04 · benchmark measured 2026-11-04 — deterministic & reproducible

Read Japanese books with a built-in dictionary, flashcards, and sentence explainer.

71/100

7/7 frames

Top 77% of 18,256 measured · #80 of 95 in language learning app

Legit Benchmark — the simple average of 7 measured frames. Frames we could not measure are left out of the average, never counted as zero. Every frame is shown below with its evidence.

Checked 2026-11-04 · scores move as sites change

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To cite this score: legit.show/s/sigmajp-works/2026-11-04. That address never changes; this page moves with every re-measure.

Legit.Show scored sigmajp 71/100 on 2026-11-04, measured across all 7 frames from its public surface. legit.show/s/sigmajp-works/2026-11-04

Is sigmajp production-ready?

Legit.Show scores sigmajp 71 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on sigmajp (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Standards; its weakest is Privacy. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

Performance — 64/100
Accessibility — 96/100
Security — 35/100
How this compares across the catalogue: The Web Security Baseline
Privacy — 25/100
How this compares across the catalogue: The Privacy Gap
Reliability — 75/100
Standards — 100/100
Discoverability — 100/100

What we measured

Security headers present: X-Content-Type-Options.
No Content-Security-Policy and no HSTS.
Served over HTTPS with a valid certificate.
Real Lighthouse performance run — 28 ms to first byte.
3 of 3 sampled routes reachable.
No privacy policy found.
Sets cookies / loads scripts with no consent prompt.
Discoverable: structured data, sitemap, OpenGraph image, canonical URL.

Who it's for

Japanese learners · JLPT test takers · Language students · Casual readers

Pricing

Free to read and try; paid account required to save and study flashcards

Sources and updates

Description: Taken from sigmajp.works's own website on 2026-11-04.
Operator: sigmajp, as named in sigmajp.works's terms, privacy page or footer.
Benchmark: Measured by Legit.Show from the live site, the way any visitor sees it — with no access to its code or accounts. Same method for every product, and no AI decides the score. Last checked 2026-11-04.

Put together from public information, without sigmajp's involvement. If anything here is wrong, tell us and a person will check it.

Visit sigmajp → · Alternatives to sigmajp → · How this was measured →