Macmillan Dictionary is my favoir dictionary. The book marked the most common words with 3 star leavls:
Three-star words are the most common 2,500 words in the language.
Two-star words are the next most common 2,500.
One-star words are the next most common 2,500.
I uploaded three files to reference the three levels.
star1 //one-star level
star2 //two-star level
star3 //three-star level
Download the Macmillan7500.apkg. Open your Anki and import the downloaded Macmillan7500.apkg file. If you want TTS in back card, you can install the Anki plugin: Awesome TTS
You can remove the words that you've known. Open the Deck -> Browse -> (ctrl+delete) remove a card.
All Done, happy learning.