A host of highly regarded apps for iPhone and iPad have gone free on Monday in what could be a major celebration to mark five years since Apple launched the App Store. So far, games such as Infinity Blade II, Superbrothers: Sword and Sworcery EP, Where’s My Water?, Badland and Tiny Wings (iPhone / iPad) are all on offer for nothing, alongside apps such as Traktor DJ (iPhone / iPad), Day One, Over, How to Cook Everything, and Barefoot World Atlas. None of these apps have ever been free on the App Store before, and many have commanded relatively high prices until now. In the case of Traktor DJ for iPad, the app normally sells for $19.99, and comes recommended by The Verge’s Nilay Patel and Trent Wolbe. Apple is yet to make any announcement regarding the offers, and none of the apps in question give any explanation on their store pages.