A PDF is a static document. You lose the ability to hear audio pronunciations, use interactive word games, or benefit from the "Word of the Day" features found in digital apps. Better Alternatives to a Free PDF
: Some users can find a free version of the dictionary available to download directly onto Kindle devices A PDF is a static document
Features specialized sections (approx. 30 pages) covering American English grammar, punctuation, and common learner errors. Amazon.com How to Access Legally for Free Merriam-Webster: America's Most Trusted Dictionary 30 pages) covering American English grammar
The Internet Archive (Archive.org) sometimes hosts scanned copies of older editions that can be "borrowed" digitally for an hour at a time. This is a legal way to view the book page-by-page if you prefer the print layout. Final Verdict use interactive word games
Unlike standard dictionaries designed for native speakers, an "Advanced Learner’s" dictionary is specifically engineered to bridge the gap between basic communication and near-native fluency.