This app will charge you 99 buckaroos if you don't cancel before your trial so be really careful. I tried it today for thirty minutes as a B2 level German tutor. This is just a ChatGPT wrapper with an okay AI voice. The guy apparently comes from Hawaii but says "Aloha" like he's a robot so it's very very funny.
The app broke down after ten minutes of use and wasn't able to maintain a conversation at that level uninterrupted. There were many pauses and stutters and even restarting the app didn't fix it so useability is an issue.
More worrying is that randomly through the speech the AI tutor inserted random Arabic words and pronunciations that had nothing to do with the German conversation we were having.
Not worth the money or time at higher levels.