A note about prices. I'm in need for such a service and thank you to provide it. But $30/month is more that what I would give. For that price, I would expect to have a human teacher to review my progression from time to time and provide advices. At $20/month, I would use the service for something like three or four month, until I decide I'm ready enough. At $10/month, I would probably consider a permanent subscriptio…
That's less than half what it'd cost to hire a language tutor for a single hour.