"Rewinder is a Safari extension that lets you go back in time and see how websites looked in the past."
Okay, but that’s just marketing-speak. Rewinder is actually a front-end for the Wayback Machine API. It uses a timeline-based design that allows you to smoothly navigate through different snapshots of a website's history. Simply scroll through the page to view past versions of a site, and tap the "Go" button to quickly access specific points in time.
You’re probably already familiar with Wayback Machine, so I won’t repeat its benefits here. But keep in mind that archive.org is VERY SLOW, so refresh the page if snapshots take too long (say, longer than 1 minute) to load. And avoid opening multiple archive.org pages too quickly, or you may encounter the "429 Too Many Requests" error.
Rewinder is a universal purchase, so you only need to buy it once to use it on all your Apple devices. I hope you find it useful.
