94%? Do they use it to do their homework, or while they do their homework? There is a huge rift between how adults and students use technology largely because of why they use technology. While I use Twitter to find a great resource for a digital citizenship project, one of my students might use it to find the party at Brian Halloway's house.
From site: "The fastest way to better writing. EssayRater is a writing support tool that proofreads your texts and protects you against: plagiarism, poor grammar, spelling errors, punctuation mistakes, poor word choice."
This sounded like a great answer for teachers wanting to help students improve their essays. However, to get the results for scanning a document, you have to pay a minimum of $19.95 a month.