Temple Run is coming to Android next month, following its hugely successful iOS release. It's currently the top grossing title on the App Store, despite being a free app — all its revenue comes from in-app purchases of coins. These aren't essential to play, but let the player buy power-ups and characters with which to run through the eponymous temple. Though the game initially launched at the 99-cent pricepoint on iOS, it's clearly finding more success as a giveaway. Imangi Studios says that while only one percent of users end up paying, the ability to earn more coins by playing the game keeps people hooked and boosts word-of-mouth. This freemium model could also make it a good match for the Android Market — many paid iOS games such as Angry Birds go for free on Android, with the Market now being the largest free app store in the world.