Open Source Alternatives to Polypane

Responsively App is a modified web browser designed to make responsive web development easier and more efficient for developers. This free and open-source tool helps you craft pixel-perfect responsive websites with ease. It is a must-have DevTool for all web developers aiming to elevate their web development experience. Here’s what makes Responsively App stand out:

• All Devices at Once: View all devices side-by-side, eliminating the need to fiddle around with the devtools resizer. Everything is available at a glance.
• Mirrored Interactions: Any click, scroll, or navigation you perform on one device is replicated across all devices in real-time.
• Quick Context Switching: Save your favorite device combinations as Preview Suits and switch between them quickly while testing.
• Extensive Device Profiles: Comes with a large collection of device profiles out of the box, and you can also add your custom devices.
• One Inspector for All Devices: The Unified Inspector allows you to inspect elements across all devices simultaneously. Just press Cmd/Ctrl + I and hover over any element to see its details.
• One Click Screenshots: Take full-page screenshots of all devices at once with a single click. You can also take screenshots of individual devices or the viewport.
• Basic Browser Features: Includes all standard browser features like cookie management, local storage, session storage, bookmarks, and more. You can also use the devtools as in any browser.

Responsively App is loved by developers worldwide for its comprehensive toolset and ease of use. It’s the perfect companion for anyone looking to master the art of crafting responsive web apps.