Nintendo Life writes: "The DSi wasn't intended just for games; part of the meaning of the "i" is in reference to using it as a "personal tool," according to some Nintendo rep who may or may not have been full of it. We've already seen some fairly useless applications hit the service already, lending credence to this, so it makes a weird sort of sense for Nintendo to roll out applications for the musical crowd with Instrument Tuner and Metronome. And what do you know, they work well enough to possibly come in handy – if you carry your DSi with you everywhere you play, that is."