Just evaluating the trial of Cookie before purchase, I have been asking everywhere for exactly this program to white list some domains for cookies and website data, while deleting everything else upon exit. So glad I've finally found it!
This does exactly what I want on my Mac.
However I'd like the cookie deletion to come over to my phone as well.
I believe cookie and other website data is synced via iCloud, correct me if I'm wrong. That should mean Cookie should manage the website data on my iOS device, but I don't think it is. Either that or I need to trigger a sync manually.
If it doesn't work like that, can you suggest anything to help on the iOS side, maybe from an extension etc. or an alternative path.
I use Safari on my Mac and iPhone, both running the latest operating systems, with the latest Cookie app. iCloud sync is enabled and both are signed into the same account.
The "Share Across Devices" option under "Settings for Websites" in iOS Safari settings is ticked.