Sonic & All-Stars Racing Transformed, the hugely popular kart racing game that features Sonic and a number of other famous video game characters, is now available for free on Android and iOS.

SEGA hopes that making the title free will improve its multiplayer experience, and the company has new updates planned to introduce new characters, tracks, and modes that will keep new and old players coming back for more.

Despite criticisms about its cheap plastic form factor and slow TouchWiz operating system, the Galaxy S5 has become Samsung’s fastest-selling smartphone to date. The device has been so successful that during its launch weekend earlier this month, it sold more units than the iPhone 5s.

Amazon has inked a deal with HBO to bring popular shows like True Blood and The Wire to Prime Instant Video subscribers without an HBO subscription. The deal will also see an HBO GO app brought to the new Amazon Fire TV, but it’ll be exclusive to customers in the U.S.

One of Apple’s most famous patents is slide-to-unlock, a method of waking up a touchscreen smartphone that has proven to be one of the most valuable in Apple’s arsenal. Now, Apple is trying to patent a similar system that would use gestures to unlock an iPhone. And if that sounds familiar, it should, because Android already does it.

credit: App Annie

Android is trouncing iOS for overall downloads, says the latest report from mobile data firm App Annie. The report says, however, that when it comes to forking over cash, iOS rules.

There are more key take aways from the data which bring to light the functional differences of the two app stores and the categories and countries that are driving the continuing growth in the sector.