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The mechanical reference book. In your pocket.

Threads, tolerances, unit conversions, standard components and tightening torque calculators. Based on UNI/EN/ISO standards. Offline, always.

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Built for every role in the workshop

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Technician / Mechanic

Quick answers in the field. Works with dirty hands, on a small screen, with no internet connection.

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Draftsman / CAD Operator

Find the right standard component fast. Tolerances, fits and ISO symbology always at hand.

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Design Engineer

Pre-sizing calculators and complete normative references for concept and detailed design.

Everything you need. Nothing you don't.

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Threads

Metric ISO, Whitworth, trapezoidal. Coarse and fine pitch, with all dimensional data.

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Unit Conversions

Pressure, force, torque, length and more. Instant, no internet needed.

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Tolerances and Fits

ISO fits browser and tolerance calculator, based on UNI EN ISO 286.

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Standard Components

Bolts, nuts and washers tables. ISO dimensions, ready to use in drawings.

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Tightening Torque

Two methods: quick ISO 898-1 and precise VDI 2230. Pre-filled from component tables.

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100% Offline

All data is on-device. No account, no subscription, no internet required.

What's coming next

v1.0 — Available now

Threads
Unit Conversions
Tolerances and Fits
Standard Components
Tightening Torque Calculator

v1.x — Coming soon

Materials database
Keys, pins and snap rings
Bearings tables

v2.0 — In the pipeline

Beam deflection calculator
Shaft sizing
Bearing L10 life
Cross-section inertia