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.