You will not use this service.
The free version is useless as key features are locked behind such restrictive word limits that you are not able to adequately test the service's effectiveness. So you'll have to upgrade to see whether the service is worth paying for. Let me save you the hassle and tell you that the premium version is a waste of money. Neither the AI detector nor the humanizer will meaningfully work to the extent that you desire. In my experience, the detector will often fail to detect AI or will flag originally written content. During my use, the humanizer would just swap key words of my sentence to random synonyms, unintentionally making the writing sound more AI and genuinely unintelligible. You'll quickly abandon this service for a better free alternative and move on. Months later, you'll discover you're still being charged because you forgot to cancel the subscription. When you contact customer support for a refund, they will bluntly respond with: "Refunds are issued only if required by law." Lovely. Thank you Mary, very helpful. I don't see how a pro-rata deduction is out of the question, but hey, I guess that's not how this multimillion dollar company deals with its customers. Save yourself the hassle. There are free alternatives that seem to work much better. Avoid this service unless you enjoy paying for something you'll never use.