My local store has it, but it was super "common sense" if you think about hockey at all.
You grab a specific pre-labelled stick with the markings on it, take a few shots with it and the app figures out the 3 sticks it thinks you should be in. From what I was told, it simply recommends the same sticks people would if you give them information about your playing style.
For example, using me as the example since I did it:
6'3, 220lbs
Defense
not a lot of slapshots, aimed a quick release.
The stick recommended 85 Ribcor as 1st, then 85 Jetspeed as 2nd, then 75 Ribcor as 3rd. Which is what anyone listening to how I play would recommend.
The only thing super helpful with it is if someone is using a stick that is way too stiff, the lack of flex in the stick would help show that off.