Apps like Greenheck Toolbox

Here are some great alternatives to Greenheck Toolbox by Greenheck :
Physics Toolkit
Physics Toolkit
★4.5
Mechanical Engineering Calc
Mechanical Engineering Calc
★5.0
RPM Calculator
RPM Calculator
★4.2
AirMaxx Lite
AirMaxx Lite
★3.6
GearBuddy RPM-MPH Calculator
GearBuddy RPM-MPH Calculator
★4.3
Pulley Calculator
Pulley Calculator
★4.2
CookTools
CookTools
★4.0
RC Tools
RC Tools
★3.9
CNC Machinist Calculator Pro
CNC Machinist Calculator Pro
★4.8
Calculator App - Electronics
Calculator App - Electronics
★3.7
Fluid Mechanics Converter
Fluid Mechanics Converter
★5.0
Audio Wizard - Calculators
Audio Wizard - Calculators
★4.7
Electrical Motor
Electrical Motor
★4.5
Psychrometric air - a rhoAir
Psychrometric air - a rhoAir
★4.0
HVAC Calculator
HVAC Calculator
★4.2
Calculator
Calculator
★4.6