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
Keysmith - Create custom keyboard shortcuts for your Mac and the web
Responsive View - Test your responsive design across different devices
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.
Multi Screen Test - Test your site at different screen resolutions & devices.
Metric.live - Real-time and advanced periodic alerts for Google Analytics.
Responsinator - Designed to test responsive websites on different devices.