Vlingo gets better the more you use it. It begins to adapt to your voice automatically as soon as you start to speak to it. The most noticeable learning occurs in the first dozen or so times you speak to it, but the learning continues as long as you use the product.
It also learns the words, phrases, and sentences you commonly speak. If Vlingo makes a mistake and you correct it, Vlingo will learn to avoid making the same mistake again later. For learning to take place, you must tell Vlingo when you're happy with your correction by completing your task (sending your message, dialing the contact, etc.).
Vlingo also learns from what other users say and uses that knowledge to improve its accuracy for you.