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: over 1 year ago
TrackDuck - Visual feedback for web design and development.
Responsive View - Test your responsive design across different devices
Valist - Automatically created staging environments for every update with a shareable link for testing
Multi Screen Test - Test your site at different screen resolutions & devices.
Usersnap - Usersnap is a customer feedback software for SaaS companies that need to constantly improve and grow their products.
Responsinator - Designed to test responsive websites on different devices.