What technique is the Costco app using to wake itself up?

uninstall the app, it is useless anyway.
I tried out some of those store apps, some of them claim they can direct you to the isle and row that the product is on.
I found that it takes 10 times longer to mess with the app, than it does to just yell "hey you!!! where is the ABS Cement?"

add to that, the locations mentioned in the app are useless also, the clerks don't listen to apps, they just put stuff on the shelves.

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What technique is the Costco app using to wake itself up?