Harmony is tough to maintain in a relationship. The constant tug-of-war between give and take can lead to as much strain as it does euphoria, but like a good whiskey, a well tuned relationship can improve with age. Since its original PC launch in 2002, the Sims series has taught us that there's more to life than locking your sim in a prefabricated prison. There's a big, bad Simmy world out there to explore and EA have finally squeezed it onto the iPhone.