The best translation extension

I have to read a lot in English and I have to say that this application is the one that gives me the most reliability. Translate a word by selecting it and making the logo transparent, both on Mac, iPhone and iPad. He does the same with phrases and he does it 100%. I have experience with Google and it is light years away! Of course, it is paid, but I do it for this type of extensions because it saves me a lot of time and I want simplicity. I am a person and I give both good and bad marks!!! In this case a 10.