GravitationalEnergyCalc app for iPhone and iPad

Potential Energy is the stored energy of an object given its position relative to a body. Gravitational potential energy is one type of potential energy and is equal to the product of the objects mass (m), the acceleration caused by gravity (g), and the objects height (h) as distance from the surface of the ground (the body).This GPE calculator will find the missing variable in the physics equation for gravitational potential energy, when three of the variables are known.
PEg=mgh
Where:
PEg or PE = gravitational potential energy
m = mass of an object
g = acceleration due to gravity
h = height of the object