Watch out, Google Maps for Android, it looks like Apple's iOS Maps may soon be entering the building -- when it comes to indoor GPS tracking anyway. The Wall Street Journal's Digits blog is reporting that Apple has confirmed it purchased WiFiSlam, a startup that specializes in WiFi-assisted indoor-GPS functionality for phone apps. Interestingly, Digits notes that the company was founded by a few ex-Googlers a couple of years back and that one of its investors has included a Google employee. Further, a quick Google search confirms that any WiFiSlam-related apps that may have been on Google Play are all but dead links now.

The word on the street is that Apple handed over $20 million to claim the company, although it wouldn't confirm any numbers -- or a specific reason for the purchase -- with the blog. While there's no actual telling whether this means we'll see indoor mapping on iOS maps at any point, it's hard not to imagine it now that Apple's made the purchase. We're seeking comment from Apple on our end, and will be sure to let you know what we hear back. For now, check out an old demo of WiFiSlam in action after the break.