Even the most confident of native speakers can sometimes have doubts about their spelling and grammar. As for learners of English, getting their writing to a really high degree of proficiency can be a real challenge. It’s great to have a friend to turn to in moments of doubt or better still someone who will proof read your work and give you a second opinion, but if you don’t have that luxury then the Grammarly plagiarism checker is probably the next best thing. You simply copy and paste your text in, click and Grammarly will read through your work checking a whole variety of different criteria and give you detailed feedback on a whole variety of issues around your text. Unlike most grammar and spell checkers, Grammarly can be set to be sensitive to your genre of writing and make suggestions based upon that.