Plagiarism Checker is software that is designed specifically to detect the originality of the article. It is used to check that is the provided work that is being published on the internet is original or have something (copied) that is present in the already published article. The plagiarism detector is always necessary to use to find the copied material.
It prevents someone from mistakenly copy the work of someone else. Sometimes when a freelancer or student writes an article to publish it on the internet is mistakenly write something is closely related to the article available on the Internet due to which the work is that student or freelancer is not considered as original. Plagiarism detector is used to overcome this mistake, so that, work is accepted as original. By checking his work through this software enable the individual to rephrase his work so that, it cannot relate to another article.
Yes! Using this free tool is as much reliable as use of the purchased one. The main thing that needs to be noted is that free plagiarism detector tool is offered by the same company which provided the purchased one. The key difference between both of the software is the amount or capacity of the tool to check the duplicate contents. You can check less amount of material at one time in the free version and more in the purchased version.
In the free version of the provided software you get size limit of the work to be checked, and maybe you have to face particular wait time to check another article. This thing does not make any tool unreliable and unworthy to use. It can create some problems for those people who want to check work in bulk, but due to size and time limitation, they can do so. Therefore they go for the purchased version.
When you have a lot of articles to check, then you go for the purchased version which allows you to work with ease. Websites that offered the free version of the plagiarism detector software also introduced the purchased version only for one purpose that people who need to do bulk work can do it frequently and to make them able to check large writing files at one time.
There is Miss Concept that free version is less reliable than the purchased one, but the fact is there is nothing like this. You are using the same software with same features whether it is free or pay for the subscription. The only difference in them is the capacity to check the work.
You are using purchased version or free version of the software there is no difference between the quality of the software and no objection to the reliability of it. The plagiarism checker will detect the copied content that you may write mistakenly and give you an opportunity to rephrase your article to make it 100 % unique.