It simply doesn't work.
It doesn't find my Android tablet or my cell phone.
It also fails to find six out of my eleven raspberries. It fails for my NAS, my router, my printer and my WiFi AP. All of those devices are on 24/365 and permanently connected to my home router. Six of my Raspberries are WiFi, five are wired. My NAS is wired, my AP is wired, my printer is WiFi.
That's before we start looking for other transient WiFi devices like Xboxes, PS4s, laptops, netbooks and everyone else's phones.
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This is a hippy & doctor free zone.