They have bigger screens and offer uninterrupted navigation, and some have forward-facing and backup cameras and other safety features.
Free smartphone navigation apps from Apple and Google offer turn-by- turn driving, walking and biking directions. And many new cars have the option of built-in navigation systems. So is there any longer a reason to buy a stand-alone GPS unit?
While smartphone navigation apps have some advantages, including limiting the number of devices one needs to buy and carry around, they also have some negatives.
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