Education & Reference

Yokoso: Learn Japanese

Last updated 2026-08-04 · benchmark checked 2026-09-11 · unchanged since 2026-08-09 — deterministic & reproducible

Yokoso is a free iOS app for learning practical Japanese for life in Japan.

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To cite this score: legit.show/s/yokosoapp-com/2026-09-11. That address never changes; this page moves with every re-measure.

Legit.Show scored Yokoso: Learn Japanese 74/100 on 2026-09-11, measured across 5 of 7 frames from its public surface. legit.show/s/yokosoapp-com/2026-09-11

Is Yokoso: Learn Japanese production-ready?

Legit.Show scores Yokoso: Learn Japanese 74 out of 100 — the simple average of its 5 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Yokoso: Learn Japanese (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. 5 of the seven frames returned a score; Performance and Accessibility were not measurable on this service and are recorded as null — not as zero. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — not measurable on this service (null — not scored as 0)
• Accessibility — not measurable on this service (null — not scored as 0)
• Security — 45/100
  How this compares across the catalogue: The Web Security Baseline
• Privacy — 25/100
  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.
• No Content-Security-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 157 ms to first byte.
• Returns a proper 404 for unknown routes.
• 3 of 3 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.

Who built it

James Ketola

Who it's for

Japanese language learners · People moving to Japan · JLPT test takers · WaniKani users

Pricing

Free forever

Visit Yokoso: Learn Japanese → · Alternatives to Yokoso: Learn Japanese → · How this was measured →