Smule is the company behind a lot of excellent music apps, and its latest release is called, simply, Guitar! by Smule. Just like much of Smule's other work, the app is designed to let you "play" a guitar via your iPhone, tapping and strumming various notes that run across the screen. That in itself is not all that innovative, but Smule's tie in to its other apps and the company's substantial licensed music library is. With Guitar!, you get access to some really great guitar pop songs, and the team has also connected this app up to the Sing! karaoke app, which means that the singers putting in their voices to match your guitar are just fans playing along as well.
That makes this app a little more special than just a standard music game. Still, despite that extra connection, there's not much else to make this one stick out -- you only get two songs for free, and then you'll either need to pay for a few more songs, or earn a whole lot of points to purchase others to play. It's nice that Smule has provided the app for free, and if you like these games they've made, this one is worth a download. But Smule is definitely starting to follow a formula here, successful as it may be so far, rather than inventing something really brand new.