l don’t recommend this school

[rachel83az]

I'm afraid to use one, because I'm afraid that if I put my paper in one, it will be in the memory and then if the teachers uses a checker, it may false flag my text, cuz it would be matching up against my own previous text. If that makes sense...lol

Makes sense. ASU uses TurnItIn for at least some of their Universal Learner classes. One part of their 1-credit class is an assignment involves writing instructions on how to make a sandwich. My submission got flagged as being something like 5% plagiarized because of the phrase "peanut butter sandwich," which repeated multiple times. I was able to click and partially see where this was coming from, presumably so I could cite it properly. I didn't get full info, though. I assume the teachers are able to see full info. I found this to be interesting, but also hilarious. ASU had no problems with that, because of course you can't cite the common phrase "peanut butter sandwich". 

That said, if you want a plagiarism checker and you're not trying to pull sneaky shenanigans, try ProWritingAid. I don't think it puts anything anywhere, especially if you use the online app and set it as a private document. Pricing starts at $10 for 10 checks and goes down from there if you pay for more checks: https://prowritingaid.com/en/App/PlagiarismChecker The online app is at https://app.prowritingaid.com/ It gives URLs when it finds plagiarised content.