Gregory's ServerAnd you and I will have to disagree about the quality of the app. It's very sticky (Duolingo's main metric is now engagement), but IMO it doesn't do much for actually learning a language.
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No comments
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Top-level
 And you and I will have to disagree about the quality of the app. It's very sticky (Duolingo's main metric is now engagement), but IMO it doesn't do much for actually learning a language. No comments
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