Is Unibot free to use?

Excuse me, I was wondering if I could clarify something about Unibot. Specifically, I'm curious to know if Unibot is available for free to use. Are there any charges or fees associated with its utilization, or is it an entirely cost-free tool that can be accessed without any monetary commitment? I'd appreciate it if you could provide me with a clear and concise answer to this question. Thank you in advance for your time and assistance.