Lifestyle & Other

Crescendo 4×4

Last updated 2026-08-26 · benchmark measured 2026-08-26 — deterministic & reproducible

iOS app for learning the Norwegian 4×4 HIIT protocol, starting from 30-second intervals.

Is Crescendo 4×4 production-ready?

Legit.Show scores Crescendo 4×4 87 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on Crescendo 4×4 (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Performance; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 100/100
• Accessibility — 100/100
• Security — 60/100
• Privacy — 70/100
• Reliability — 100/100
• Standards — 92/100
• Discoverability — 85/100

What we measured

• Security headers present: X-Frame-Options, X-Content-Type-Options, Referrer-Policy.
• No Content-Security-Policy and no HSTS.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 167 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 built it

product account @mistylogicapps

Who it's for

Fitness enthusiasts · HIIT athletes · VO₂ max improvers · Beginners to advanced runners · Apple ecosystem users

Visit Crescendo 4×4 → · Alternatives to Crescendo 4×4 → · How this was measured →