Education & Reference

LexUp

Last updated 2026-07-06 · benchmark measured 2026-09-13 — deterministic & reproducible

LexUp is a free app for building English vocabulary across CEFR levels.

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Legit.Show scored LexUp 94/100 on 2026-09-13, measured across all 7 frames from its public surface. legit.show/s/lexupapp-com/2026-09-13

Is LexUp production-ready?

Legit.Show scores LexUp 94 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on LexUp (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Privacy; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 88/100
• Accessibility — 90/100
• Security — 80/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 100/100
  How this compares across the catalogue: The Privacy Gap
• Reliability — 100/100
• Standards — 100/100
• Discoverability — 100/100

What we measured

• Security headers present: HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
• No Content-Security-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 94 ms to first byte.
• Returns a proper 404 for unknown routes.
• 3 of 3 sampled routes reachable.
• Has a reachable privacy policy.
• Sets cookies / loads scripts with no consent prompt.

Who it's for

English learners · Language students · Vocabulary builders · Test takers · Global language learners

Pricing

100% free

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