Touch Arcade: Considering Square Enix's recent foray into music rhythm games, I admit I was a bit surprised to see something as standard as Symphonica [Free / Free (HD)] hit the App Store. However, just because it conforms to genre norms doesn't make Symphonica necessarily bad. In fact, with its emphasis on classical music and easy controls I'd say this music game is pretty enjoyable, though a superfluous story and a somewhat lacking song selection are the biggest detractors holding Symphonica back.
IGN: "Symphonica could’ve taken rhythm games to a new place with old music, but myriad issues kill the harmony."
GamesTM: "On a mechanical level at least, Symphonica is a decent rhythm-action game, with lots to keep your fingers busy across a variety of proven tunes, but the overall presentation and attention to detail lacks the x factor that iNiS is best known for. Yes, it’s a comeback, but it’s not quite the comeback we hoped for."
Pocket Gamer: An excellent rhythm game that features responsive controls, plenty of challenge, and a cute storyline. Symphonica doesn't hit a single sour note.