Apple Store App knows when you walk into an Apple Store

Re:Apple Store App knows when you walk into an Apple Store by adamjernst on Friday October 21, 2011 @01:20PM (#3140737)

A clever solution used by e.g. Shopkick is to play a very high-pitched sound of a certain frequency on the store sound system and pick that up with the device microphone.

I don't know if Apple is using this here. I bet they're instead identifying it by store Wi-Fi, since Apple stores all have that already. But for stores without Wi-Fi, the sound system trick works well since all stores have sound systems already.

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Re:Apple Store App knows when you walk into an Apple Store by mikeash on Friday October 21, 2011 @01:28PM (#3140779)

I doubt that either the store sound systems or the phone's microphones perform well at frequencies above the audible, though, so it may not be quite the drop-in solution that it appears to be at first.

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