I cannot end this list without mentioning iStudiez pro. iStudiez pro was specifically made for students and it basically allows you to schedule all of your assignments, your homework. tests and midterms as well as input information about your teachers, your classes information about textbooks, your class schedule extracurricular activities information on your holidays. It also has great reports and allows you to synchronize with your Mac OS calendar or Google Calendar app. Also iStudiez Pro is available for iOS Mac OS Windows and Android. And it’s individual free in each one of these systems. In case you want to synchronize between different devices you will have to upgrade to the premium version. However if you just want to use this app either on your phone, your laptop, or your tablet device, you can experience the full free version without any hassles payments or subscriptions.