PLATYPUS
sleep
Give me a page and I'll look at it on every phone at once.
Platform Platypus. By Astra. Is it presentable, and is it the same on iPhone, Android, iPad and desktop?
Pick the page's HTML file together with its CSS and images (hold Ctrl). Matching file names are wired in so the page looks right.
Web addresses get a preview only. Browsers do not let one site look inside another, and many sites refuse to be shown in a frame at all. For the checks, paste the HTML or open the files.
Astra's pages I keep working on every platform. Load one and I check it on every device, then compare with what it needs below.
A small page with the usual cross-platform mistakes, so you can see what I catch.
Take a screenshot of the same screen on two platforms (say iPhone and Android) and drop them in. I scale them to the same width and show where they differ.