I tested Duolingo, Babbel, and Rosetta Stone with 100 Students for 6 Months. Only 3% became fluent.
We recruited 100 adult language learners and tracked them for six months across three of the market’s most promoted language apps: Duolingo, Babbel, and Rosetta Stone. The marketing claims were bold. “Achieve fluency in months,” they promised. What we discovered was starkly different from the narrative you see in app store reviews and marketing materials. […]