The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From SA BA:
Whether you are taking a driving license or have been driving for a while, this app is a useful tool.The app is divided into six different categories:Prohibitory signs, Manadatory signs, Warnings signs, signal by police officer, direction signs and instruction signs.There is another category called "Exam", it consists of 65 random questions from all of the above categories.After a category is selected, you will have to answer random questions. After each test, you can check your answers and get them corrected.There are about 400 questions which are randomly selected for each test, so no test will be the same.