Learning goals & outcomes
Learning any language as a subject to get good grades is a different ball game from learning a language to ‘Speak/write/read/listen like a native’.
One helps the other but I guess when the goal is different, different approaches and different outcomes are bound to happen.
And apps like duolingo, language transfer, anki etc, all have different approaches, ways, goals; so the different outcomes are inevitable.
Just pondering upon the this thought yet to learn any language, the destination everyone wants is the same. To be able to communicate effectively via writing and speaking, and to be able to understand via reading and listening.