Simon 5 is coming soon!
Simon version 5 is currently in beta testing. It is a massive update, introducing a much-requested feature: syncing the Simon data between multiple Macs, plus a Simon Status service, a Link Checker filter, improved Find filter, iMessage and Speak Error notifiers, a new app icon, and much more.
Important: please note that Simon 5 requires a minimum of macOS 10.12 (Sierra), and will be a paid upgrade from Simon 4 after the beta. Purchasers since September 1, 2020 automatically get a version 5 license (that also works in previous versions).
Re: Add to cart feature
Hmm. In theory that would be possible via a sophisticated Script-based service that fetches the page, looks for changes itself, and submits a form with appropriate values. But it would not be easy. Simon isn't designed to do that, so you wouldn't be able to leverage many Simon features.
In the future I want to enhance the Smart Change Detection feature to perhaps allow using a script to evaluate the changes, which would help. I also plan to allow using a script for a notifier, which would also help.
Sorry I can't be of more help yet.
Many thanks for your
Many thanks for your feedback.
Keep up the good work as it is a brilliant piece of software.