Fruits and Vegetables App by Cleverbit

The Fruits and Vegetables App by Cleverbits is one of the most popular free App on this topic. It is a trimmed version of their commercial App.
The free app contains the following number of cards
12 fruits
15 Vegetables
4 berries
4 flowers
4 mushrooms
4 nature scenes
4 natural events
4 seasons

It is a good app with beautiful pictures, clear pronunciation of each word, and background sounds.
You can watch a video of this app below

Here is a link for the App in Google Play store