EngTools - Engineering Toolbox

AppogeeTools

In-app purchases

About this app

EngTools is a practical engineering calculator app for everyday work.

Includes fast calculators and converters for:
• Unit conversion
• Mechanical engineering (stress, beam deflection, torsion)
• Electronics (Ohm’s law, voltage drop, wire size)
• Workshop tools (drill & tap, bolt torque, machining)
• Aerospace (Mach number, orbital velocity, rocket equation)

Designed for engineers, students, technicians and makers.

ENGTOOLS PRO (one-time purchase)
Unlock advanced calculators:
material weight, geometry, spring rate, machining feeds & speeds,
threads & tolerances, battery runtime and more.

Light & dark mode.
Multi-language support.

Thank you for your support!

What’s new

Added full app functionality with 8 Aerospace categories, 6 tools each, a cleaner design, bug fixes, performance improvements, and Android 15 edge-to-edge support.