HowNet is the most authoritative duplicate checking software in China, which has been adopted by many universities. Its advantage is that it has two joint databases of college students, including the papers of previous graduates, thus improving the accuracy of duplicate checking. The disadvantage lies in its high price and a large number of fake and shoddy products on the market.
In contrast, paperfree, papertime, PaperPass and other duplicate checking systems are mainly suitable for duplicate checking of the first draft of the paper. Their advantages are that the first duplicate check is free, the algorithm is strict, the test report is accurate, and the test report can be submitted in time, so that the author can modify the paper in time.
It should be noted that different duplicate checking systems have different comparison libraries and algorithms, and it is impossible to simply compare which one is more stringent. In addition, for specific paper types and repeated inspection purposes, different repeated inspection systems may be needed to obtain the most accurate results.