I'll try to tell you as much as possible about the non-triviality of this product. I have a good command of English (at least that's what I thought), but still, year after year, I wanted to improve it even more but didn't do anything. I started it more out of boring interest, but after logging in, I couldn't log out for more than an hour. The app literally addresses my needs. AI highlights my weaknesses so coolly, such as grammar, accent, fluency, etc., and allows me to work on them, rather than starting from scratch or with useless things like in Duolingo or Rosetta and others. I didn't have a critical need to learn English right now, but words can't convey how much the app lit a fire for further learning. This is without exaggeration one of the best ways to use AI today. And, by the way, the AI itself is very well made (it's more than just drifting between different forks of answers for the user). Try it!
