Here are a few useful speech apps for IPhone/IPad that you can experiment with for developing expressive and receptive language in toddlers. These tools can help learn skills like imitating sentences and answering questions with a picture context, as well as following directions embedded in a sentence.
My PlayHome - Following directions - Lite version is free.
My Scene - Age 2+ Story Creation - Free
Outdoor Fun - $2.99
Toddler Seek and Find - Lots of versions - Good reviews - Free to $2.99
Fun with Directions - Following Directions - $.99
What's in the bag - (literally) Guessing - Can be used with all ages** - $.99