Things have changed recently with phone gps apps, and so I reckon a more up-to-date discussion of what people are using (than what I found when I searched) could be useful. I used to use an app I bought through i-Tunes for around $30, and thought it was amazing that such a small amount of money could get me a program that did essentially everything that a dedicated gps unit would do for a whole lot more. I used it as a voice guide only - phone in my pocket, listening to music through decent sound isolating earphones to protect my hearing, and the voice dropped in to tell me where to go (ever-so-politely) when required. Great for riding through unfamiliar cities interstate. I've now gone Android, and discovered that gps has gone free. I have picked the Here Maps app, by Nokia (I have a Motorola, but the app doesn't care!). It works well, though the one disappointment so far is that it doesn't give street names, just directions of turns. Not a big deal so far, but not perfect. So, what are you using, what's good, and what's not so good?