Works like a charm!
Accurate answer to spoke length using all the info one needs to do so. Not over-thought like most web based spoke calculators.
Axle width (over the axle nut dimension), flange diameter (actual centerline diameter through spoke holes, not the outside diameter of the flange), flange offset (distance from right and left locknut to corresponding flange) and all other hub dimensions can be found by simply measuring your actual hub with a metric ruler.
A very useful app very well designed and executed. Kudos to the developer!