WebApp is an iPhone application developed by Yaroslav Ermolaev that allows users to convert any web page into a standalone application. With WebApp, users can access their favorite websites and web applications without the need to open a browser.

One of the key features of WebApp is its ability to prevent the iPhone from entering sleep mode while the application is active. This is particularly useful for users who need to keep a web page open for an extended period of time, such as when following live streams or monitoring real-time data.

WebApp also offers the option to hide or customize the color of the status bar. This allows users to have a more immersive experience when using web applications, as they can remove distractions and focus solely on the content.

In terms of functionality, WebApp supports cookies, enabling users to stay logged in to websites and web applications. Additionally, the application also supports geolocation, allowing websites to access the user's location if necessary. Another noteworthy feature is the support for the iPhone's camera and microphone, enabling users to interact with web applications that require these functionalities.

Overall, WebApp is a convenient tool for iPhone users who want to convert their favorite websites into standalone applications. With its ability to prevent sleep mode, customize the status bar, and support various functionalities, WebApp enhances the user experience and provides a seamless way to access web content on the go.