This is a free app which has several chapters. Each chapter starts with a quick review and then follows with a short quiz. The app explains the answer either as a reinforcement of the correct answer or to explain why the chosen answer is incorrect. At the end, the student receives a score.
The app covers an introduction, finding nth roots, simplifying radical expressions, multiplying, dividing, adding and subtracting, using the distributive property, conjugates, radical functions domain and range, radical equations, introduction to complex numbers, adding and subtracting complex numbers, complex conjugates, multiplying and dividing complex numbers, complex numbers with math operations, absolute value of complex numbers and i to the power of n.
This is really a neat app. Tomorrow, I"m going to check out another one. It is sometimes hard to find apps to uses with the upper levels.