My experience: Essentially all consumer language learning apps are only useful for learning up to maybe CEFR A2 or B1. That makes sense, because that's all the

My experience: Essentially all consumer language learning apps are only useful for learning up to maybe CEFR A2 or B1. That makes sense, because that's all the typical consumer has patience for. Going beyond this basically requires hiring a tutor, because so few people ever progress to that point.