diagnosis

Not a scoreboard. This sheet names what is costing you time and hands you a drill built from it. Everything is computed from your own keystrokes, held on this device only, and never sent anywhere — with one opt-in exception, clearly marked below.

Reading local history…

DATA—Custody

checking

Nothing here is uploaded. That also means nothing here is backed up — clearing site data ends the record. Export before you switch machines, clear a profile, or trust a year of practice to one browser.

Import a bundle