SimExams CBT software's exam engine module is availabe for Android phones too so the candidates can take exams from their mobile phones. Android application of exam engine is available for download from Google Play Store.
This app includes all the same features as windows version of the exam engine. Which include adding the test modules, taking exam in learn mode or exam mode, saving results, reviewing saved results and analysis. You can get a list of features of CBT Exam Engine Module here
App can be downloaded from app store at : Download SimExams CBT Exam Engine Android App
Some screenshots of the App, please click on image to enlarge: