What do you prefer web application or Desktop applications ? and why?

i prefer that the way to access to my app would not be only from my laptop or my desk , i need to get access where ever i was   

Best of both worlds , eg. the place I'm typing A browser (i.e. desktop website) loads a web site amd has plugins that behave like desktop apps. These days lot of desktop apps use webbrowsercontrols to load dynamic content for some screens. This way it's easier for both , the user does not need to explicitly update his App , also the developer need not create a separate deployment executable each time he wants some change.

There are lots of apps floating around in the world today. Desktop applications are installed on a personal or work computer desktop. Web applications can be accessed through the Internet. Some people argue that web applications are superior for various reasons. Other people argue that desktop applications will always reign supreme.

Web Application Advantages

The biggest, and most obvious, advantage to using a web application is flexibility. A web application can be accessed from any computer no matter where you are. This is due to the fact that a web application only exists online. Some people believe that this advantage is one that can’t be passed up. 

Desktop Application Advantages

Desktop applications are reliable and trustworthy. You can access a desktop app as long as you have your computer within reach. These applications don’t rely on an Internet connection in most instances. One unfortunate drawback to a desktop application is that you can’t access this type of app if you don’t have your computer handy.