Before we get to the apps, let's discuss why you'd still consider a standalone GPS in the first place.

And most GPS devices offer multi-segment routing (a trip with one or more stops along the way), while many apps only allow for one starting point and one destination.

Navigating also takes a heavy toll on your smartphone's battery life, since you have to have location services turned on and your device won't be able to go to sleep during long trips.

A few apps, including Google Maps, offer cycling directions and integrate bike-only routes into their maps.

A handful of apps offer walking navigation, though some that do have limitations or errors. Many people travel by a combination of driving, walking, and/or public transit, so having access to all three in one handy app makes sense.

Skype's video and audio calls are free within the network (i.e.

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