Thanks! I just wanted to use it myself as it's always hard to find a native speaker to speak with when learning a language. The app is partly vibe coded. I myself am a software developer and had no problem reviewing the vibe coded code. I think it took me a little more than a month give or take, as i was not consistent with my commitment. I would say the syncing part of the conversation was the challenging part, which is still not perfect to be honest. As for user data, i don't store much of user data apart from the minutes used.