Flash card Age 0-2 for iPhone app for iPhone and iPad

The Flash card Age 0-2 ver 4.0, The application is build for exposing infants to basic objects around them and for their primary learning. What makes this app unique is the fact that the images used on the cards are real object images which a child can see around him. The app is designed for iPad with minimum navigation.
The app has Alphabets as free for all users and uses in app purchase feature. The other categories included are Objects, Animals, Color, Animals, Numbers, Shapes, Fruits, Vegetables, Birds, and Vehicles.

There are following numbers of elements in each category:
Level 1
* Alphabets (English) : 26
* Objects : 57
* Animals : 36
* Colors : 13
* Numbers : 10
Level 2
* Shapes: 17
* Fruits: 15
* Vegetables: 20
* Birds: 18
* Vehicles: 20

The app currently is only in English language, with Audio.

We would like to welcome any suggestion and feedback to make this app even better