Mechanic Toolbox

Offline shop calculators for tyres, torque, gearing, fuel, brakes, and more—right on your phone.

Mechanic Toolbox is an offline toolkit of automotive calculators for mechanics, DIY owners, and workshop use.

Save vehicle profiles and run tyre, torque, gearing, fuel, EV, battery, engine, 4x4, suspension, brake, performance, and towing calculations on your iPhone or iPad—no account and no internet required for core tools.

WHAT YOU CAN DO • Compare tyre sizes and check speedometer error • Convert torque units and estimate wheel torque • Work out gearing, RPM, and speed relationships • Calculate fuel economy, range, and related values • Store vehicles, favorites, and recent results for quick reuse • Switch metric/imperial units, theme, and language

BUILT FOR THE WORKSHOP • Works offline after install • Clear result screens with accuracy notes where relevant • Designed for fast, practical day-to-day shop math

IMPORTANT Results are for reference and planning. Always verify critical values against manufacturer specifications and local regulations before modifying a vehicle or performing safety-related work.

Privacy Policy: https://pradapjackie.github.io/privacy-policy-all/mechanic-toolbox/ios/privacy.html

Support: support@pradappandiyan.com