Which plagiarism checker to choose?

Hello,
preparing my papers and have problem. My teacher says it’s up to me to choose plagiarism checker. Says he will not tell which he is using. However, he recommended these: Plagramme.com, turnitin, plagscan. Which you think is the best? Should i use all of them? Coul you say something about this soft?

I have always used turnitin without many problems! Haven’t tried the others but I think you’ll be fine with just using one or two. good luck :slight_smile: