Free version a commercial-paid version great
I downloaded the free version and was annoyed by all of the prompts to buy. However, I thought it was the best flash card app Ive seen and bought it on the spot. My 4 yr old loves it. The design is simple and easy. Theres flexibility-you can just do shapes or shuffle across all categories.
Morrtl about
Toddler Flashcards (Free)