Responsively App is a must-have tool for web developers on Windows, offering a complete set of free and open-source tools to create responsive web apps with ease. It allows you to view multiple devices simultaneously, mirror real-time interactions, switch between device contexts, and access a large collection of device profiles. The Unified Inspector, one-click screenshots, and basic browser functions are additional handy features.

One of Responsively App's standout features is its ability to display multiple devices simultaneously, providing a panoramic view for a comprehensive overview of design and functionality across different devices, eliminating the need for constant resizing of development tools.