The Pimsleur apps are not gamified for the most part and the Mandarin teaching is good enough that my in-laws are happy when I speak with them. I don't think I would get any other tool. The gamified apps are not useful to me, and a new calm app is not interesting.
As someone who has paid for language learning applications many times in the past, let me be categorical: I am not interested in what you are selling. I hope that helps inform your product direction.