A new tool, made by InfoWorld, can be used for helping the users with the right choice to make when it comes to buying the smartphones that which one they should go for by keeping their personal as well as their business needs in mind. This tool is online and is available for free. It is called the mobile death-match calculator that allows the users to tell about seven of the basic sets of criteria. From these individual settings there will be shown a personal score for each of the devices present. The users can choose from Blackberry, iPhone, Palm pre or Droid. There are also the predefined usage types which are to be selected by the users from a menu shown to them in order to quickly achieve the custom score. These types are personal usage, usage in small businesses, medium to large businesses and last are the usage in much regulated kind of businesses.