Update needed

This app used to be amazing, however the addition of health bars makes it intimidating for people wanting to learn a new language. In addition, I have run into the problem where lessons dont actually teach me words, but instead assume I already know them, when in fact they have not been covered in any lesson. As a result, when I get these words incorrect (as I was never taught them) I deplete my health bar and cannot complete the lesson. Please fix this asap.

Ricky.shier about Duolingo Learn Many Languages for Free, v5.1.6