Nice interface for learning, too few words

I really like the interface that this app uses for learning vocabulary. However, the number of words is way, way too small. Im not sure Im willing to pay $5 a pop in hopes of eventually getting a vocabulary list that has more than a few words that I dont already know. I would keep the interface, but lose the Spanish 1, Spanish 2, Spanish 3, etc approach. Stuff all of the vocabulary words into one app, and add additional vocabulary in future (free) updates.

Karen LH about Spanish Vocabulary 24/7 Language Learning