Around the world the iPhone app Hardest Game Ever 2 is proving popular with iPhone users in the USA, while in Australia iPhone users have been playing the darkly comic Dumb Ways To Die. Details of this and other top free iPhone applications by country for the week, by number of downloads, recorded on May 15, can be found below. 

Online retail giant Amazon's virtual currency becomes legal tender for US App Store customers and Kindle Fire owners. To celebrate the official launch, all existing US Kindle Fire owners Monday would have seen 500 Amazon coins -- the equivalent of $5 -- deposited into their accounts, which can be spent in the Amazon App Store to buy apps and make in-app purchases on their tablet devices. As well as giving away what Amazon claims equates to "tens of millions of dollars worth" of the virtual currency, customers can also buy Amazon coins in bulk at a 10% discount.

Online retail giant Amazon's virtual currency becomes legal tender for US App Store customers and Kindle Fire owners. To celebrate the official launch, all existing US Kindle Fire owners Monday would have seen 500 Amazon coins -- the equivalent of $5 -- deposited into their accounts, which can be spent in the Amazon App Store to buy apps and make in-app purchases on their tablet devices. As well as giving away what Amazon claims equates to "tens of millions of dollars worth" of the virtual currency, customers can also buy Amazon coins in bulk at a 10% discount.

Early adopters are disappointed that the 16GB version of Samsung's latest flagship phone only has around 8GB of usable storage once the device's operating system and pre-installed apps are taken into account. CNET, the first publication to pick up on user complaints, performed a factory reset on a Samsung Galaxy SIV to check available space and found that only 8.49GB of its 16GB memory could be used for storing additional apps or multimedia content.