Which innovative design feature did Duolingo introduce in 2012 that revolutionized language learning apps by applying gamification principles?

Product design in the language industry has evolved dramatically in recent years. From language learning apps to translation tools, the way linguistic products are designed affects how we learn and communicate. This poll tests your knowledge about a famous product design decision that changed how we interact with language learning tools.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

• The skill tree progression system with hearts/lives
• Voice recognition pronunciation assessment
• Spaced repetition algorithm for vocabulary learning
• Peer-to-peer conversation practice matching

Powered by AIPolls.Net — AI-powered real-time polling platform.