Demo: Kind of! The demo has a fairly limited amount of content: 24 flashcards worth of pronunciation training, 8 words and 24 sentences. So there's stuff you can learn from that content, but you're not going to come out of this demo speaking Spanish if you didn't start that way!
Beta: The August beta has a lot more content - half of our Spanish pronunciation trainer and 141 sentences, so you actually could get a decent chunk of info into your head if you really made a lot of flashcards out of those sentences. As time progresses, we'll continue adding a LOT more content, and allow you to start saving your flashcards, so you'll be able to really learn a lot.
The later betas/final release will have way, way more content, including our full pronunciation trainers (all 500-900 cards of them), our 625 word list, our custom frequency lists, and the ability to add whatever custom content you want.