Classroom vs Self-study Byte AppStudio
https://itunes.apple.com/us/app/pmp-exam-mentor/id1040921779?ls=1&mt=8
https://play.google.com/store/apps/details?id=com.byteappstudio.PMPExamMentor
https://www.microsoft.com/en-us/store/apps/pmp-exam-mentor/9nblggh5xb1q