Monitor, archive, go back in time. It is an easy to use website archival utility.

Features of peacockmedia Website Watchman 3
Monitor a whole website, part of a website, or a single page
Set up configs for multiple sites / pages
Schedule hourly, daily, weekly, monthly scan
Be alerted to any changes, visible text, source code or changes to the page's resources
View and be able to demonstrate what a page looked like on a particular date
Be aware of every change to a competitor's page / site
Runs locally, not a cloud service. Own your own data.
An archive is kept, including all changes to pages, images, style sheets and js
View a 'living' version of a historical page, not a screenshot
Switch between versions of the page to compare them
Export a historical page as image or collection of all of its files
Export the entire site, preserving all files as they were on a given date, or processed to make a browsable local copy of the site
Technical Details and System Requirements
Supported Operation System: macOS 10.12 or later 64-bit