The Georgia Council on Economic Education has developed an app for mobile devices that provides practice questions in each domain and allows students to review for individual units or the AP test.
The app is available in the App Store for Iphones or Ipads and in the Play Store for Android devices. Look for the GCEE Advanced Econ Test Prep App.
Their description is below:
With questions written by very successful Advanced Placement teachers, this app is a great resource for practicing questions on advanced Micro and Macro economic topics. The randomization of answers and questions keeps the user engaged through multiple plays. New questions will be added periodically!