Which language learning app first pioneered the 'freemium' model with bite-sized lessons, gamification, and streak-based motivation that revolutionized language learning accessibility?

In the evolution of language learning products, packaging has transformed from physical dictionaries and textbooks to digital experiences. This poll explores a pivotal moment in linguistic product history when a revolutionary packaging approach changed how millions access language learning resources. Test your knowledge about this significant shift in the language learning industry!

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Duolingo (2011)
Rosetta Stone Mobile (2009)
Babbel (2008)
Memrise (2010)