Read the Point
Read the gauge, then claim only the precision you own.
Four drill formats
Train the eye. Earn your laurels.
Each trial puts a real gauge in front of you. Reading it is only half the craft — knowing how much to trust it is the rest.
Zero Drift
Catch the offset of a closed gauge, then correct a live reading.
Cracked Tablet
Some recorded readings cannot exist. Name the broken limit.
Tolerance Tribunal
Read a dowel or socket and rule: accept, rework or reject.
In the workshop
Real scales. Honest uncertainty.
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Twelve true-to-scale gauges
Verniers, dial and depth micrometers, indicators, levels, protractors, dividers — drawn from their real scale geometry.
±
Claim what you can prove
Pick your uncertainty. Over-claim and the stone will tell you; under-claim and you leave precision on the table.
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ISO 286 fits
Hole and shaft codes across eight size bands. Rule on dowels and sockets like a master mason.
📖
The Codex
Reading guides for every instrument — anatomy, good habits and the classic traps — plus a glossary of metrology terms.
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Ledger & Laurels
Track your accuracy over time and earn ten laurels named after Greek masterpieces.
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Private by design
No account, no tracking, no network. Your progress stays on your device.
The tool rack
Every gauge has a workshop job.
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