Apps like Greenheck Toolbox

Here are some great alternatives to Greenheck Toolbox by Greenheck :
RPM Calculator
RPM Calculator
★4.2
Physics Toolkit
Physics Toolkit
★4.5
Mechanical Engineering Calc
Mechanical Engineering Calc
★5.0
MotorSim 2
MotorSim 2
★4.4
AirMaxx Lite
AirMaxx Lite
★3.6
GearBuddy RPM-MPH Calculator
GearBuddy RPM-MPH Calculator
★4.3
Pulley Calculator
Pulley Calculator
★4.4
CookTools
CookTools
★4.0
RC Tools
RC Tools
★3.6
CNC Machinist Calculator Pro
CNC Machinist Calculator Pro
★4.9
Calculator App - Electronics
Calculator App - Electronics
★3.7
MOTORUN ENGINE TOOLS - PRO
MOTORUN ENGINE TOOLS - PRO
★3.8
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