Different duplicate checking systems have different algorithms and databases, so the duplicate checking results will be different. For the first draft of the paper, it is suggested that free duplicate checking software such as paperfree, papertime and paperday can be used. And for the final draft, use the duplicate checking system required by the school to ensure that the paper meets the requirements of academic norms. Welfare in Fecha. If you need to download the paper copy inspection report, you may have to pay.