Currently the iPhone has the largest app store, so it would have the most apps available. Android phones also have a lot of apps available.
Many smartphones have the ability to download apps from a marketplace. You will need to download an app that will allow you to scan, or photograph, a barcode. There are several apps that have this ability.
There are too many companies to count that make apps for smartphones. It would depend on what type of app you want in order to find the right company to build the app.
There are many useful web apps for smartphones. Some of the the most useful include Oracast, IBM, and the Slash web app, these allow for the most fluid and beneficial experience for your smartphone.
Smart phones have apps, but that's not all they have. Most have music, videos, and, of course, phone capabilities
The National Journey Planner has apps that are available for Android and Apple Smartphones. These apps may be downloaded for free.
Many smartphones support GPS apps including the iPhone and tHe Blackberry. If your current phone does not support GPS apps, you can purchase a GPS receiver chip.
Yes, there are several apps available for a Blackberry that would function as a GPS. You can download these apps and more at http://us.blackberry.com/smartphones/features/gps.jsp.
A TFT screen is better - because it can be made interactive. That way, the user can start apps or enter text fia an 'on-screen' keyboard. LCD screens cannpt do that.
Worlds best 5 android and iphone mobile apps are :Angry BirdsAir flight Control - Android (not avail on iOS, releasing on iphone soon)Ant SmasherBird Hunting - Android (not avail on iOS, releasing on iphone soon)Air Control
Operating systems for tablets and smartphones are very similar. The tablets are usually able to handle more processing, so they can handle some apps that a phone cannot.
CNET Review has conducted a review of smartphones. The reviews can be viewed at http://reviews.cnet.com/best-smartphones. They currently rate the Motorola Droid Razr Maxx as #1.
PDA's are really becoming obsolete as smartphones are now taking over. Most smartphones are better than PDA's because most smartphones are able to have useful and fun apps downloaded on them and usually have more features in general than PDA's today.