Application software, also known as apps, are computer programs that perform specific functions for personal or business use. There are many types of application software including word processors, spreadsheets, databases, graphics software, presentation software, web browsers, and more. Application software can improve productivity, efficiency, and decision making. They are available in different models such as freeware, shareware, open source, and closed source. Businesses benefit from application software through improved customer service, data security, flexibility, and productivity. The cost of developing an application depends on its functionality, platforms, integrations, and other factors.