I had a quick look at that article, and before reading it I noticed it’s almost 2 years old. Is it still relevant?
Also, it was mostly about Android. I only saw it mention iOS once, but it didn’t actually talk about it I think (did I miss that part?).
In other articles I see that iOS 8 introduced the feature, but iOS 10 broke it. I don’t own an iPhone, but I think they are on version 12.something now.
Does anyone have more recent/clear information on this topic regarding Android and iOS?