The electronics titans square off in a tangled tale of mobile technology, centered on Apple's iPhone
The new device's sensors will track heart rate, steps taken, calories burned and sleep, according to a Microsoft privacy statement.
Apple says iOS users will be better able to search for and browse through categories and subcategories of apps.
The game is available for $4.99 in the App Store for both the iPhone and iPad. However, you need an iPhone 4S or higher if you want to play the handset version.
The application allows people to listen to the millions of songs in its library, as well as upload up to 20,000 of the user's own songs to the service for access elsewhere.
But the app doesn't appear to be making much of a ripple in the Google Play store, and isn't listed in the top free apps list.
Developers have managed to get a version of third-party app store Cydia up and running on iOS 7. But it seems far from done.
Infinity Blade 2 leads an assortment of free apps and games as the Apple App Store prepares for its 5th birthday.
Georgia Tech security researchers this week noted they managed to successfully slip some malware onto the App Store in May.
Apple's App Store redefined how we all downloaded programs on our smartphones. But with Google Play outstripping its number of apps, the challenge of the next five years isn't volume -- it's getting the right app in the right hands.
The person who downloaded the 50 billionth app will receive a $10,000 App Store gift card, and the 50 people who downloaded apps right after that each will claim a $500 gift card.