Based on our record, Responsive Viewer seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Bonus! Useful Chrome extension for Responsiveness Testing. - Source: dev.to / about 1 year ago
This chrome extension with all of the breakpoints set up https://chrome.google.com/webstore/detail/responsive-viewer/inmopeiepgfljkpkidclfgbgbmfcennb. Source: almost 2 years ago
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
Responsive View - Test your responsive design across different devices
Invision - Prototyping and collaboration for design teams
Multi Screen Test - Test your site at different screen resolutions & devices.
Zeplin - Collaboration app for UI designers & frontend developers
Responsinator - Designed to test responsive websites on different devices.