Teachley is a wonderful company w/ educational iOS apps for learning basic Math skills (i.e. Addimal Adventure and Mt. Multiplis). These simple to use yet highly engaging fun games help students develop their skills while educators can track their progress and assess them in real-time. All games help students build cognitive skills through Game Based Learning not just drill and practice.
I highly recommend checking out Teachly by clicking here!!!
Below is a brief demo...
*Teachley is an advertiser of Technology Tidbits.