There’s an app for everything these days. But here’s one that really rocks! Next week, EA, MTV Games, and Harmonix will release an iPhone version of the megapopular Rock Band game. The play for drums, bass, and guitar is all about the same, with four tappable spots along the base of the screen. Avid Rockers may find the version a little too easy, and skills don’t necessarily translate between platforms (for instance, the vocal play doesn’t call for singing, just more tapping). But this app proves that playing along with your fave jams — whether on plastic guitars or your iPhone — is always a good time.