Hi Tim,
Thanks so much for your interest in our plugins! While we’re not able to test every third-party theme for full compatibility with The Events Calendar suite, we’ve developed our products with WordPress best practices in mind, and you should find that our plugins work well with most themes developed to similar standards. You can read more about third-party compatibility with our plugins on our Knowledgebase here:
https://theeventscalendar.com/knowledgebase/third-party-compatibility-events-calendar-plugins/
If you’re unsure of whether a particular theme or plugin will work with your setup, my advice would be to try it and see! We offer a full 30-day refund policy on all of our premium products, so you’ll have plenty of time to set up our plugins and test them thoroughly–should you find that they’re not a great fit for your project, we’ll be happy to refund your entire purchase price.
I hope that helps! Thanks again for reaching out, and let us know if you should have any other questions or concerns! 🙂