Should you search for a common keyword that Apple has allowed advertisers to target, the App Store will show the familiar app card -- detailing its name, developer rating and price -- but sponsored listings will show a light blue background and a small badge labelled "Ad."

When Apple SVP Phil Schiller first confirmed that developers could influence the visibility of their apps, the company wanted to be "fair to developers and fair for indie developers," allowing smaller studios with limited budgets to make their creations more visible to the hundreds of millions of iOS device owners.

Apple continues to reinforce the claim that its Featured sections are "not for sale," so this could be seen as a fair compromise. The company follows Google, after the search giant introduced a similar feature in May 2015. Apple's marketing teams will need to continuously monitor the placement of ads so that users aren't shown spoofed apps or are tricked into downloading a third-party app purporting to be the real deal.

This article has been updated to remove a note about a spoof Pokémon app. The app appeared in the iOS 10 betas but has been removed from sponsored listings in the public releases.