Productivity

FretTool

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

FretTool is a fretboard diagram editor for sketching chords, scales, and fingerings.

Is FretTool production-ready?

Legit.Show scores FretTool 50 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on FretTool (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Performance; its weakest is Discoverability. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 100/100
• Accessibility — 55/100
• Security — 45/100
• Privacy — 25/100
• Reliability — 47/100
• Standards — 64/100
• Discoverability — 15/100

What we measured

• Security headers present: CSP.
• No HSTS.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 104 ms to first byte.
• Returns a proper 404 for unknown routes.
• 0 of 0 sampled routes reachable.
• No privacy policy found.
• Sets cookies / loads scripts with no consent prompt.

Who built it

Miroslaw Kaluzny

Who it's for

Musicians · Guitar teachers · Songwriters · Band members · Fretboard learners

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