Hello,
Thanks a lot for getting in touch.
Rank Math is free and the current version you have will always remain free.
We do plan on releasing a paid version but that will have additional features. We will update you when we do release this. You can also check out our roadmap here: https://rankmath.com/roadmap/
Hope that helps and please do not hesitate to let us know if you need our assistance with anything else.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.