I'm not an expert either, but if you guys are needing this app for Qi charging to work, then I assume the difference must be with the receiver. I'm using the "BLUBOON" receiver that is being sold on Amazon and eBay. And I'm using the stock KK ROM.
I saw today that someone with the same receiver as me is having a problem after switching to Lollipop, so that's disappointing to hear.
Quite worrying that it may not work with Lollipop, maybe that person needs this app or this app would need a tweak.