In-dash units:
Pros* Look a lot neater* Integration with stereo system so that audio can cut out when GPS directions are being given or in telephone calls.* Harder to steal* Better GPS reception* Dead-reckoning (ie will still give you position when GPS signal is lost).* Big screens* No wires running across the dash.
Cons
* Unit and add-ons are expensive* Expensive map upgrades* Limited GPS features* Some units only have coverage of major cities and highway.* Can't take it with you if you don't travel with your vehicle.* No regular speed camera updates.* No regular firmware updates.* No traffic updates* Will the GPS unit still be supported in 5-10 years
Portable units:
Pros
* Units are cheaper* Cheaper map upgrades* Firmware regularly updated to provide new features or bug fixes* Can take the GPS with you if you travel.* Generally have more GPS features* Most units have regular safety camera updates.* Map coverage is generally quite good.
Cons
* Smaller screen* Portability makes them easier to steal.* Generally can't integrate with car audio system.* No dead reckoning, although some units have begun to implement it.Recommended portable GPS is Tomtom and Eonon. Such as:
From portable and in-dash navigation systems to marine, handheld and fitness GPS navigation
"A great place to purchase a GPS navigation system is Best Buy. They have portable, in-dash, handheld, and many GPS system accessories to choose from and have good deals and offers for their customers."
The cheapest Garmin GPS is the Nuvi 205 3.5" Portable GPS. It is available at Walmart: http://www.walmart.com/ip/Garmin-nuvi-205-3.5-Portable-GPS-Black/13020913.
GPS portable systems can be used for navigation, tracking, search & rescue operations, finding information and optimization of routes. The GPS will also help with finding several venues in a city.
Car GPS navigation can be more helpful than a map because it is hands free. GPS tells you exactly where to go when you input a set destination. Maps can be confusing and difficult to read.
An in-dash gps system would be better in a car. Handheld gps systems seem to generally have smaller screens and are made specifically for outdoor use. An in-dash gps is designed for in car use.
From portable and in-dash navigation systems to marine, handheld and fitness GPS navigation
There are a variety of reasons to get an in-dash GPS instead of getting a portable device. Some people simply do not like having to constantly attach the portable device to their windshield, which can often become unstuck. You should be aware it will cost a lot more to get a GPS installed in dash however.
I do not believe that you have to screw the gps holder into the dash of your car. If you do not know who to do this then you could bring it to a professional and they could help you install it.
The iphone does include portable GPS navigation, however, based on the screensize, you may find that a dedicated GPS system is better if you need to use it frequently.
Portable GPS units work anywhere, in any car or handheld. A factory installed GPS unit generally cannot be moved to another car.
Several companies make an in-dash GPS device for your car. A few of these companies are Garmin, Magellan, and Sony. Several car manufactures, like Ford, also install these in-dash from the factory.
You can purchase a GPS car dash mount from Best Buy, eBay, Amazon, Walmart, Target, and you might even be able to get a GPS device installed in your vehicle.
Many car GPS devices have a mode for walking. They're great for navigating new cities. There are also portable GPS devices intended for runners and outdoor hobbyists.
Some people have a GPS built right into their cars. While these are easy and convenient to use, a portable GPS is often even better. If you go into a friend or family member's car who does not have a GPS, you can bring yours along with you. What happens if your on a trip, the car breaks down and your rental doesn't have GPS in it? Then you are going to need to entirely re-route the expedition and get some good old fashioned paper maps and directions. Instead of having all of these worries and woes with you when you try to go on vacation, simply purchase a portable GPS that can travel with you wherever you go to.
First, one advantage would be that you will always have directions in case you get lost. Many times a portable gps can be forgotten at home, but one in the dash makes it so that you will always have one. Secondly, is that it can help get you where you need to be faster. GPS's are great tools to have while driving because it can cut your driving time, and helps you avoid unnecessary traffic.
you get portable facebook, twitter, instagram, and it has a GPS.