Fleex - Intelligent subtitles is a free Chrome add-on developed by fleex-dev. It falls under the category of Browsers and is listed under the subcategory of Add-ons & Tools. This program allows you to improve your language skills while enjoying your favorite movies or series on platforms like Netflix, Amazon Prime Video, and YouTube.

With Fleex, you can watch videos in English with smart subtitles that are translated into your native tongue. The subtitles are shown on demand, and you can choose to view them in English or in your preferred language based on your settings. Additionally, you can click on any word in the subtitles to display its translations in context, as well as related expressions. This feature helps you expand your vocabulary and learn new phrasal verbs.

Fleex also offers the option to automatically build up your personal vocabulary list, making it easier for you to review and practice the words you've learned.

Please note that while the add-on itself is free, to watch videos on Netflix or Amazon Prime, you will need a subscription to these services. However, you can access any content on YouTube for free.

To learn more about Fleex - Intelligent subtitles, visit fleex.tv.