As a non-native English speaker, it is always a big challenge to prepare a manuscript with an acceptable English. And when I want to use proof reading services, they say because of the sanctions, they can not edit my article. So I was wondering if anyone can suggest me a free online proof reading service. Please just if you have personal experience with the website, and you are satisfied with the results, write it here. There are a lot of websites that are just wasting of time.
Thanks for your help.