GPS Smartphone Apps vs. Dedicated Car GPS Devices

Which is better for your needs?

GPS navigation has grown into a robust product category with many options. App stores offer a variety of smartphone navigation apps, and manufacturers such as Garmin and TomTom sell dedicated GPS devices. We examined each type of technology to help you decide between the two.

The car GPS systems discussed here are not to be confused with factory-installed systems, such as OnStar, that offer advanced features such as automatic crash response and vehicle diagnostics.

GPS apps vs GPS devices

Overall Findings

GPS Smartphone Apps
  • Clear, sharp displays.

  • Small fonts and menus are hard to use in a car.

  • Voice directions offer clear guidance.

  • Large smartphones are good for dash mounting.

  • Quality and functionality of mounts varies.

  • Always updated with the latest maps.

  • Always connected to a cellular network.

  • Drains battery and uses mobile data.

  • Usually free.

Dedicated GPS Devices
  • Large resistive touchscreens.

  • Menus and controls optimized for arm's-length viewing.

  • More information on the display.

  • Come with windshield mounts and power port chargers.

  • Mounts are adjustable and adaptable.

  • Access to high-quality maps and databases.

  • Requires a monthly fee to maintain connectivity.

  • Can be expensive.

Both dedicated GPS personal navigation devices (PNDs) and smartphone navigation apps offer high-quality, accurate maps and directions. PNDs offer larger screens and dedicated mounts. On the other hand, because smartphones are always connected to the internet and have capacitive touchscreens, you might prefer their ease and flexibility.

Some top navigation apps include Waze, Google Maps, and Apple Maps. Well-known PND manufacturers include Garmin and TomTom.

Smartphone apps such as Waze, Google Maps, and Apple Maps are free to download. Dedicated car GPS systems cost from $100 to several hundred dollars or more.

User Interface: Bigger Might Be Better

GPS Smarphone Apps
  • Clear displays and touch functionality.

  • Small displays are hard to use in a car.

  • Not optimized for arm's-length viewing.

Dedicated GPS Devices
  • Large displays designed for arm's-length viewing.

  • Screens include more information.

  • Simple and durable.

A smartphone offers a sharp, clear display with a capacitive touchscreen. It functions well when held in the hand, but it's harder to see and use any farther away.

Most GPS turn-by-turn navigation apps have tried to adapt to car-mounted use with larger fonts and buttons. However, these are still smaller than those found on a typical dedicated GPS device.

PNDs have resistive touchscreens that are typically 4.3 inches or 5.5 inches diagonally, compared to about 4 inches for a typical smartphone. Larger-screen PNDs with 5-inch screens are becoming more common. PND menu systems, touchscreen keyboards, display letters, and numerals have been optimized for arm's-length viewing and tuned for usability while driving.

The simplicity, durability, and larger size of the dedicated GPS PND resistive touchscreen wins out in this comparison, and this is one of the biggest factors to consider in the smartphone vs. PND choice.

PND displays have room to include more information about the distance to upcoming turns, upcoming street names, speed limit information, time-of-arrival information, and more.

Windshield and Dash Mounting: PNDs Have the Edge

GPS Smartphone Apps
  • Windshield mounts can be costly.

  • Some mounts don't allow for phone charging.

Dedicated GPS Devices
  • Mounts come with the unit.

  • Mounts have chargers and other features.

Many use their smartphone's turn-by-turn navigation while the phone rests on the passenger seat or some other flat area, or they listen to the directions. A windshield or dash mount provides safer, easier viewing for turn-by-turn directions.

Smartphone windshield mounts range from simple, one-size-fits-all holders with no charger ports or additional features to sophisticated units with chargers, speakers, supplemental GPS chips, microphones, and more. A smartphone windshield mount can be costly, so factor that into your decision. Also, make sure the mount includes a charger or that you have an accessory power port charger for your smartphone.

Dedicated PNDs include windshield mounts and power port chargers. Mounts from the major manufacturers are well-built, adjustable, and adaptable to various mounting points using included sticky-backed disks. PND mounts come right in the box, so PNDs have the edge in mounting.

Third-party alternative mounts for GPS devices offer more functionality and features.

Quality of Maps and Directions: Equally Accurate

GPS Smartphone Apps
  • Use high-quality maps and databases.

  • Accurate directions.

  • Map sets are onboard or downloaded on the fly.

Dedicated GPS Devices
  • Use high-quality maps and databases.

  • Accurate directions.

  • Map sets are onboard.

Smartphone map and points-of-interest databases are downloaded initially with the purchase of the app, as with TomTom for iPhone, or are downloaded on the fly. When you download maps on the fly, you always have the latest version. The downside is that you can be without maps in remote areas out of a cellphone tower range. If you do a lot of rural driving, stick with onboard maps.

Smartphone turn-by-turn apps generally use the same high-quality maps and databases provided by mapping giants TeleNav and NavTeq, as do the PND manufacturers. Google has gone its own way with Google Maps. Name-brand smartphone turn-by-turn apps and PNDs offer equally good experiences.

PNDs keep map sets on board. Most makers offer free map updates periodically.

Connectivity: Smartphone Connectivity Gets the Edge

GPS Smartphone Apps
  • Sophisticated connectivity features.

  • Excellent web browsers.

Dedicated GPS Devices
  • May or may not include network connectivity.

  • Minimal-function or no browser.

Smartphones have the advantage of always being connected to the cellular network and the internet. Some smartphone GPS navigation apps take advantage of this connectivity with sophisticated search, real-time traffic detection and avoidance, and gas prices, while others make scant use of the internet. Check out the app's connectivity features before you download it.

Dedicated PNDs may or may not include cellular network and internet connectivity. Check the specifications, and look into whether you'll need to pay a monthly fee to maintain connectivity in a PND.

Smartphones generally have excellent web browsers; PNDs have minimal-function browsers or none at all.

Though smartphone connectivity gets the edge, using a PND protects cellphone battery life.

Final Verdict

There's a lot to consider in the smartphone navigation vs. PND debate, but the good news is that you have many excellent products to consider in both categories. Think about ease of use, how often you'll use navigation, and where you travel. If you generally listen to voice directions and don't need to access navigation while driving, an app is fine.

If you're concerned about battery drain, mobile data usage, small smartphone screens, and mounting problems, a dedicated car GPS service might be the right choice.

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