They used to be amateur imitations of their desktop counterparts, with only one or two functions and not at all practical. But my, have these web apps grown. Web apps these days have become so powerful and useful that in some cases, they’ve begun to replace desktop software. Desktop programs are great and all, but they don’t provide the same benefits as web apps that make use of cloud computing. With most web apps, you only need a browser and an internet connection to access all your data online. Aviary.com. Online Presentation Tools.