In Pictures: 15 iPhone apps that changed our world

The first iPhone hit the market less than five years ago -- and shook up our world. Now iPhone sightings are everywhere, with Apple lovers listening to music, playing games and staring into tiny screens. The last holdouts are coming around and finally getting a smartphone. Most people feel lost without their iPhones. Can you live without these iPhone apps?

Music

We all know how the iPod filled the gaps in our daily lives. We kill time riding trains or buses listening to our favorite songs. We've got playlists to put us in the right mood and mindset for, say, work or workouts. It's a good bet you've listened to more music in the past decade than the rest of the decades put together. What would we do if we didn't have music on our iPhone? Maybe play games (next slide, please).

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