Education & Reference
Mainichi
Last updated 2026-07-18 · benchmark measured 2026-07-18 — deterministic & reproducible
Mainichi is a Japanese vocabulary app using SRS flashcards and a prefecture-based journey.
Is Mainichi production-ready?
Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Mainichi (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Privacy. The per-frame breakdown is public on the Legit.Show listing; the single overall production-readiness score is reserved for the verified maker.
The 7 Frames
- Performance — 98/100
- Accessibility — 96/100
- Security — 80/100
- Privacy — 25/100
- 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 — 416 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 it's for
Japanese learners · Language students · Mobile learners · JLPT prep students · Casual learners
Pricing
Free download available; Premium and Lifetime tiers mentioned but specific pricing not stated