Duolingo is a language-learning education platform that offers 98 total courses across nearly 40 distinct languages. The platform enables anyone to learn languages for free, though they can also pay $7 each month for a premium service that removes ads, delivers offline access, and more. It also claims 30 million users are actively learning languages on its platform, and it has emerged as a downloaded educational app globally. Duolingo provides ''Duolingo for Schools'' with features designed to allow teachers to track their students. It uses many services in the Amazon Web Services suite of products, including Amazon DynamoDB, Amazon Virtual Private Cloud, nearly 200 virtual instances in Amazon Elastic Compute Cloud (EC2), Amazon Simple Storage Service (S3), and Amazon Relational Database Service (RDS). The company uses the freemium model; the app and the website are accessible without charge, although Duolingo also offers a premium service for a fee.
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