Luminance converter app for iPhone and iPad

Use this useful tool to convert luminance choosing one of the 21 units of measurment included in this app (with the availability to add custom units), that are:
candela/square, meter, candela/square centimeter, candela/square foot, candela/square inch, kilocandela/square meter, stilb, , lumen/square meter/steradian, lumen/square centimeter/steradian, lumen/square foot/steradian, watt/sq. cm/steradian (at 555 nm), nit, millinit, lambert, millilambert, apostilb, blondel, skot, bril.

For every units of measurment are also included formulas to convert that unit as you want.