COMath App looks like a one-on-one tutor can provide the support, attention, and time you require to answer questions, develop skills, and reach academic potential of mathematics.
Kids could practice addition, subtraction, multiplication, or division at anytime from anywhere without any pencils.
More than 100,000 math word problems with rationale are provided here too. They are distributed by different grades, make it easier to start training.
And the algebra equation solving tool could help students work with equations. It figures out how to solve a problem step by step.