Quick Math Jr. is an excellent iOS app (free right now) for young learners ages 3-7 yrs old learning Math. This app has 6 different educational games that helps kids learn different aspects of Math such as: counting, addition/subtraction, number placement, and more. Also, Quick Math Jr. differentiates instruction and adjusts its level of difficulty depending on how well they're doing.
I highly recommend checking Quick Math Jr. by clicking here!!!
For my Pinterest board on Educational iOS Apps click here.