$Duolingo(DUOL.US)The only way to save Duolingo is.

1. Transform it into a language social platform rather than a simple language learning app. After following friends, you can chat with them and must communicate using the language you have learned, further increasing user stickiness.

2. Add features similar to social media feeds, allowing users to post text and images in the language they are learning. Duolingo can embed ads in these posts to generate additional revenue without compromising the user experience.